Template:Katsuki Synopsis/Rise of Villains

Provisional Hero License Exam Arc
Class 1-A moves into Heights Alliance following U.A.'s conversion to a boarding school. Shota introduces his class to their new homes, but first, he confronts them about Katsuki's rescue. He claims everyone but Katsuki, Kyoka, and Toru would be expelled if it weren't for All Might's retirement. The mood over the class becomes gloomy. Katsuki raises everyone's spirits by forcing Denki into his stupid state. Then he repays Eijiro for the night vision goggles he bought for the rescue mission.

Everyone moves into their new dorms and the girls try to host a room king contest. Katsuki thinks its stupid and goes to bed instead. Class 1-A begins training for the Provisional Hero License Exam the next day. Ectoplasm, Midnight, and Cementoss bring the class to Gym Gamma to develop a set of Ultimate Moves for the exam.

Katsuki trains to develop his Quirk by using his explosions to spar with an Ectoplasm clone. He's able to destroy one with a large scale explosion and expresses his joy about being able to let loose again. He demands Ectoplasm give him another clone to fight and continues training. All Might and Shota watch and agree that Katsuki will continue to grow stronger.

A few days later, Katsuki develops a new Ultimate Move. He focuses his explosion into a single point and then fires it off as a concentrated blast. Katsuki develops AP Shot (Armor Piercing Shot) and uses it to pierce a solid slab of stone. A piece of the stone falls close to All Might and Katsuki warns him. Deku suddenly swoops in and kicks the stone to pieces, surprising Katsuki and everyone watching.

Irritated, Katsuki tells All Might to watch himself and storms off with an explosion. The day of the licensing exam arrives and Class 1-A travels to the National Dagobah Arena. Inasa Yoarashi introduces himself to Class 1-A and Katsuki notices he's from the most famous hero course in western Japan, Shiketsu High School.

Ketsubutsu Academy High School students arrive and introduce themselves to Class 1-A. Yo Shindo tries to shake Katsuki's hand and comments he has a strong heart after being at the center of the Kamino Incident. Katsuki refuses Yo's hand and tells him to stop pretending because he can see through his fake facade.

Everyone enters the stadium and Yokumiru Mera explains the purpose and rules of the licensing exam to over one thousand participants from various schools. Only 1% of students can pass the first phase of the exam. Students must use orange balls to tag the three "weak points" that everyone must place on their bodies. The first one hundred students to eliminate two people will advance. Katsuki takes his three targets and puts them in plain view across his waist.

The first phase begins and Izuku suggests that Class 1-A stick together, but Katsuki refuses and goes off on his own. Eijiro and Denki follow Katsuki to a street side area of the arena. Katsuki yells at them both to stop talking and Eijiro replies telling Katsuki to relax. A mound of flesh is thrown at Katsuki and Eijiro throws himself in the way to save his friend. The flesh attack transforms Eijiro into a meatball that lands in Seiji Shishikura's hand.

Seiji starts monologuing about Class 1-A's vulgarity compared to their Shiketsu rivals. Katsuki mentions that he hates Seiji's type but Denki is intimidated. He even taunts Seiji's eyes and Denki pleads with Katsuki to stop provoking him. Seiji activates his Quirk and claims that Katsuki acts in ways that disgrace heroes. Katsuki refutes Seiji's claims and tells him to speak with actions instead of words.

Seiji attacks with flesh bullets and Katsuki counters with his AP Shot: Auto-Cannon Ultimate Move. The violent U.A. student claims he made a weaker version of his Ultimate Move so he doesn't kill anyone. Seiji prepares his next attack and claims he'll break Katsuki's pride so he'll become dignified. Katsuki rushes Seiji and says he'll shut up once he's blown to pieces. Denki reminds Katsuki that they're in the middle of the test and the latter replies that's why he has to kill his Shiketsu opponent.

Denki tries to intervene but ends up missing his target. Seiji taunts him and Katsuki interrupts with an armor-piercing shot. Seiji manages to block the attack and sneaks a piece of flesh onto Katsuki's neck. Before Katsuki is kneaded into a meatball, he throws one of his grenades to Denki. Denki uses the grenade during his fight with Seiji. Denki commends Katsuki for thinking ahead and not putting his teammates in danger.

Denki manages to injure Seiji and he loses his hold on the meatballs. Katsuki and Eijiro return to normal and both deliver the finishing blow. Katsuki berates Denki for taking so long and upsets him. Seiji's other victims return to normal as well. Excited, Katsuki licks his lips and announces they have targets.

Katsuki, Denki, and Eijiro manage to eliminate two people each and pass the exam. They go toward the anteroom and happen upon Izuku, Ochaco, and Hanta on their way. Katsuki says he isn't surprised that Izuku passed and says he's made his borrowed Quirk his own. This shocks Izuku as Katsuki walks by him straight into the waiting area.

All of Class 1-A manages to pass the first test and the arena is transformed into a disaster zone. Before rescue exercises begin, Nagamasa Mora confronts Katsuki along with Inasa and Camie Utsushimi. He asks Katsuki if he met Seiji during the first phase. Katsuki confirms he defeated Seiji and Nagamasa apologizes for Seiji's attitude. Nagamasa claims Seiji can't help projecting his ideals onto someone famous like Katsuki.

The second phase of the exam begins and Katsuki rushes off on his own again. Once again Eijiro and Denki follow him through the arena. They arrive at the mountain area and there are two H.U.C. people asking for help. Katsuki yells at them and orders them to save themselves. They conclude that Katsuki realized they were low priority rescue but dock his points for an inappropriate tone. Katsuki overhears this and scares them with his anger.

Katsuki refuses to help other people that Denki and Eijiro decide to rescue. The exam ends after Denki and Eijiro save the last two people from H.U.C. Everyone meets to look over a presentation board revealing who passed the exam. Katsuki is livid to find out that he failed the exam. He demands Denki let him see his grading sheet. Yokumiru Mera eventually addresses those who failed, which includes Shoto and Inasa as well. Yokumiru reveals that there is a three-month special training course that students can pass to obtain their provisional licenses. Katsuki, Shoto, and Inasa all decide they will participate rather than taking the test again.

That evening, Class 1-A talks about classes starting up again. Katsuki walks past Izuku and tells him to come outside to have a talk about his Quirk. Katsuki reminds Deku that he's always gotten under his skin. Deku used to be a nobody and now Katsuki wants to know how he got into school with a Quirk that appeared out of nowhere. Ever since All Might arrived at U.A., Deku has gotten stronger until finally, he passed the licensing exam while Katsuki failed.

Katsuki asks Izuku if he got his Quirk from All Might. He knows that All For One has the ability to take people's Quirks because he stole Ragdoll's. Izuku met All Might and started growing while All Might lost his power and had to retire. Katsuki brings up the last thing All Might said after beating All For One. He realizes now that Deku was the only one who knew what All Might actually meant by "you're next". More evidence includes the Nomu's multiple Quirks and the relationship between All Might and All For One.

Katsuki tried asking All Might before but didn't get an answer, so now he asks Izuku for the truth. When seeing Izuku doesn't deny anything, Katsuki figures he's correct. Izuku asks what's next and Katsuki tells him that because Katsuki's idol chose Izuku, they must fight to settle things once and for all. Izuku doesn't want to fight and tells Katsuki they can spar in a training room instead. Katsuki reminds Izuku they won't be able to go all out. He wants to see why All Might chose a person like Izuku to inherit his power.

Katsuki wants to know if Izuku's admiration was for better reasons than Katsuki's and if everything he's done to be like him is wrong. He starts stretching and Izuku tries to talk him out of fighting. Katsuki tells Izuku to put his fists up and then remembers that his rival uses kicks now. Kacchan attacks Izuku and nearly blows him up with a right hook. He tells Izuku that he's always overthinking things and to just fight.

Izuku wants to talk things out but Katsuki is infuriated by memories of Deku constantly following him throughout their lives. He attacks until Deku is forced to defend himself and kicks Kacchan back. On the brink of tears, Katsuki asks why he was the cause of All Might losing his strength. Katsuki feels like if he had never gotten captured than All Might would've never had to lose his power fighting All For One. It's been haunting him and this fight is an outlet for him to get his feelings out. Deku recognizes this and accepts Katsuki's challenge.

Izuku kicks Katsuki in the face and declares he won't be Katsuki's punching bag. They've known each other for years but this is the first time Katsuki and Izuku have finally let their feelings out into the open. They connect their hearts through combat as Katsuki relentlessly attacks Izuku without giving him time to think or catch his breath.

Katsuki gets annoyed because he believes Izuku has a plan and is looking down on him. Izuku has always followed him throughout their lives but Katsuki still thinks that Izuku just wants to be better. Izuku is surprised and takes a moment to explain that Katsuki is wrong. His power explodes as he gets emotionally and states that he wanted to see what his amazing friend would become. Izuku delivers an 8% One For All kick that destroys Katsuki's attack, as the former claims that's why he's always chased him.

Katsuki slides back and recovers from his injuries. He thinks on Deku's words and admits to himself that Deku has surpassed him. Both of them go all out and clash their Quirks at full power. Izuku surprises Katsuki with his new level of speed and manages to force him back. Izuku gets riled up and he starts talking like Katsuki. They clash in mid-air and Katsuki believes he has the advantage. However, Izuku fakes a kick and catches Katsuki off guard with a 5% Detroit Smash.

Izuku comes extremely close to getting the best of Katsuki, but he uses all of his power and refuses to lose. Katsuki flips himself on top of Deku and uses a large explosion to crash them both into the ground. When the smoke clears, Katsuki pins down his rival and claims victory. A distraught Katsuki is not comforted, he wants to know how Izuku could lose a fight with All Might's power.

All Might suddenly appears and breaks up the fight, revealing he was watching it happen. Katsuki asks why All Might chose Izuku after the Sludge Villain incident. All Might explains that Izuku's heroism is what garnered him a chance to compete with strong people like Katsuki. Katsuki replies that he's weak too and that it's his fault All Might lost his power. All Might embraces Katsuki and tells him that One For All was always going to fade regardless of what happened. All Might apologizes for focusing too much on Katsuki's physical strength.

All Might tells the boys that needing to be the best and wanting to save others are both key to becoming a great Pro Hero. He advises them to learn from each other and grow into heroes that can win by saving people and save people to win. Katsuki knows All Might is right and tells Izuku not to lose anymore with All Might's power.

Katsuki asks who knows about All Might and Deku and the former says out of the students only Katsuki knows the truth. Katsuki promises to keep it a secret and the two heroes thank him. Katsuki claims that it would just be a pain if the truth got out. All Might explains to Katsuki about the whole truth about One For All, his injury, and how he chose his successor.

All Might leads them both out of Ground Beta and reminds Katsuki it's not his fault. Katsuki claims that his goal to become a hero that surpasses All Might hasn't changed. Katsuki tells Izuku that he's going to absorb knowledge from his classmates and surpass even the chosen one. Izuku claims that he'll climb even higher and this irritates Katsuki. They start arguing about surpassing each other and All Might recognizes that they've evolved into proper rivals now.

When they return to Heights Alliance, Shota restrains them both with his scarf and scolds them for fighting. All Might tries to get his colleague to calm down but he still issues four days house arrest to Katsuki and three to Izuku. They must clean all the rooms and write a written apology on the last day of their punishments.

The next morning, Katsuki's classmates berate the duo for fighting. Already irritated, Katsuki gets even more annoyed when Shoto inquires about their extra classes. After everyone else leaves, Izuku asks Katsuki what he thinks about Shoot Style. After a small pause, Katsuki calmly tells Izuku that his movements are too obvious and even when he got faster his attacks were readable. He also adds that Izuku's punch irritated him. This is the first time that Katsuki and Izuku have a normal conversation with each other.

Shie Hassaikai Arc
After his recent fight with Izuku, Katsuki still spends one more day of his house arrest. Katsuki feels irritated that he's still a few days behind his classmates, especially Izuku. However, Katsuki eventually returns to his class and resumes his daily lessons. For the following days, Katsuki and Shoto both go out of their dorms to retake the Hero License Exam, with Shoto constantly reminding the former to catch up with their other classmates.

Remedial Course Arc
The day after the work study group return to Heights Alliance, Katsuki and Shoto retake the Hero License exam with Inasa and Camie. While there, they have to reach out to a group of unruly children with their hearts. Katsuki accurately deduces that there is a leader among the children who sets the mood for them to be rebellious. During all of this, Katsuki meets a young boy who has a similar attitude towards everything. Katsuki then advises him to not look down on others because then he would never acknowledge his own weaknesses. Katsuki ends up passing his exam alongside the others.

Eijiro requests for Katsuki to train with him since he wants to test his limits. Katsuki ignores him and asks Izuku if he has made any improvements in his Quirk but Izuku states he has not. Katsuki berates him for his lack of initiative, as he brings up Izuku's promise to surpass him before he leaves. He then takes Eijiro upon his request.

U.A. School Festival Arc
At U.A. High School, Class 1-A chooses to make a band and dance performance for the U.A. School Festival. While walking outside, Katsuki overhears the Department of General Education talking about his class's performance for all of them. The Department of General Education students are taken aback by their arrogance even when they start all the conflict.

Back in Class 1-A's Heights Alliance, Tenya is busy helping plan Class 1-A band and dance performance. Kyoka Jiro suggests club rock and asks if anyone can play instruments such as drums. Denki Kaminari remembers Katsuki having experience in playing drums which Hanta Sero agrees to. Katsuki refuses to as Hanta mocks Katsuki's inability to do so. Katsuki grabs some drum sticks and starts playing the drums proficiently. Katsuki's performance impresses Kyoka who wants him to play the drums. Katsuki begins walking away while expressing his disinterest.

Katsuki also expresses his discontent with Class 1-A presenting the band and dance performance as a stress reliever, believing people who sicken him do not deserve his courtesy, and states that all they are doing is indulging the other students. Tenya and Momo Yaoyorozu take Katsuki's views into consideration as Shoto Todoroki points out that Katsuki should not speak ill of them as he hasn't even partaken in the conversation. Katsuki tells them that they do not fight villains because they enjoy it and likewise they should not consider people's feelings for a band and dance performance; if they are going to do a band and dance performance, they should do it for the sake of it and not please or help people. Katsuki announces that he will blow everyone away in U.A. with his sound. Some of Class 1-A are surprised by Katsuki's willingness to participate; Kyoka also decides to do her best.

Joint Training Arc
Katsuki spots Izuku speaking to All Might and decides to get answers. He surprises the pair and tells them that their secret talks would get them caught and asks about Izuku's Quirk and discovers it activated on its own. He questions if Izuku has truly made it his own since he intends to prove himself stronger than before getting annoyed by Izuku smiling at his challenge.

Before the battle, Katsuki and his team discuss their strategy for the fourth round of the Joint Training Battle. Katsuki wanted to take the lead and charge ahead with the others serving as back up. He tells Kyoka to pick up on the sounds coming from the Class 1-B team and to figure out their location. When Hanta spoke up against this, Katsuki mocked him and says that if they do not make the first move it is over for them. He says that they do not have time to take caution, they have to act immediately. Leading his team, Katsuki has them keep up and orders Kyoka to forget about listening to the sounds, to their annoyance his behavior.

While surveying on his own, Katsuki believed he spotted Class 1-B and had Kyoka use her Quirk. She proceeds to do so and says that all the Class 1-B team members should be nearby and to go find them. Upon further use of her Quirk, she yells to her teammates that it's a trap. Setsuna appears behind Katsuki and says that his time is up and proceeds to attack him with her Quirk.

It's revealed that Setsuna's Quirk is Lizard Tail Splitter. With her Quirk, she is able to split her body into several pieces and move them. At the moment she is able to divide her body up to 50 different parts depending on the length. Katsuki gets bombarded by Setsuna's Quirk and notes that while their strength does not amount to much, they annoy him because they are too small of targets.

Soon Katsuki evaded her and arrived to help his teammates. The explosive hero stops Rikido from sacrificing himself by destroying the glue-covered pipes and barricade with his explosion while still being relentlessly assaulted by Setsuna's lizard parts. With the barricade gone, Togaru dives towards the Class 1-A team to attack them with Setsuna telling him to take care of Kyoka first since she is the most troublesome. Just as Togaru is about to land a fatal blow on her, Katsuki intercepts him and hits him with a powerful explosion at point-blank range.

Blasting Togaru away, Katsuki takes command again by declaring to his team that they're going to score a perfect victory by ending the match in a 4-0 with everyone unscathed. After being told that Kyoka is receiving interference, Katsuki blasts forward with full speed.

However, this allows Yosetsu Awase to reveal himself and detained Katsuki with his newly developed Ultimate Move "Construction-Done-Kwik: Weldcraft". Struggling to break out of Yosetsu's trap, Katsuki witnesses Rikido Sato arrive to free him with his Sugar Rush Ultimate Move. Now released, Katsuki proceeds to chase after Yosetsu, who then tries to protect himself by attaching multiple steel plates to his body. It is revealed Katsuki deceived him by blasting upwards, only for Hanta and Kyoka to stun Yosetsu with a combined attack.

Pleased by this, Katsuki shows confidence in his allies, as he locates Kojiro making himself an open target. Setsuna and Kojiro attempt to ambush Katsuki, but he manages to knock down the latter with a powerful explosion. While his comrades are revealed to have successfully restrained their opponents.

Directed by Kyoka, Katsuki heads towards the remaining members of 1-B. After locating Togaru, Katsuki engages in combat with him, before he manages to defeat Togaru with a fiery Ultimate Move, while a recovering Setsuna notices one of Katsuki's grenades attached to a spare part. This gives Class 1-A an advantage as they notice an explosion from a not-so-far distance. Just as Setsuna believes that she avoided getting caught, Katsuki catches her off-guard by firing off a Point-Blank Stun Grenade directly at her body. Setsuna commends Katsuki for how much he changed as she gets caught in the explosion. The explosive hero replies back that he hasn't changed a bit as he still retains his main goal of becoming the No. 1 Hero that surpasses All Might.

Returning to the rest of his class, Katsuki is commended by Shota for his leadership, cooperative nature, exceptional mobility as well as combat ability. Katsuki then notices All Might, who compliments the explosive hero's outstanding performance. Shrugging this off, Katsuki is approached by Izuku who praises Katsuki's accomplishment, in which he tells Izuku to hurry up and show some improvements at least.

While witnessing Izuku's team battle, Katsuki is shocked by Izuku using a new Quirk.

After the training, he, Izuku, and All Might gathered in the lounge to discuss Izuku's sudden Quirk and the One For All predecessor who possessed it. Katsuki asks All Might how he knew about the black tendrils, but All Might admits that he too was in the dark about it until Izuku filled him in. All Might wonders about the bald predecessor and the fact that One For All is capable of letting Izuku use previous wielders' Quirk, saying that his master, Nana Shimura, probably didn't know that this was a possibility either. Katsuki asks Izuku if there was a trigger that caused Blackwhip to manifest, but the latter denies this, explaining that he was only told that ‘the time has come' and wondering if there could've been some form of external catalyst.

Katsuki then asks if this turn of events has anything to do with All For One, explaining that it would make sense as he was the person who created One For All in the first place and he can also possess multiple Quirks. To test Izuku's activation, All Might has Katsuki and Izuku engage in a sparring match at Gym Gamma. During the match, Katsuki questions Izuku on why he hasn't activated his Blackwhip ability, in which the latter reveals that it apparently can't be unlocked as of now. All Might immediately halts the match for the sake of discussing more of Izuku's current development. Katsuki points out that Izuku's black tendrils only appear whenever he's put into mortal danger.

At the dorms of U.A., he is present when Class 1-B comes to socialize with Class 1-A and overhears Shoto question Izuku on his second Quirk. He notes on Shoto's oblivious nature to Izuku's Quirk.

Meta Liberation Army Arc
During the early morning of December, Katsuki and Shoto left for the final lesson of the provisional license course. He is seen eager to obtain his license when Gang Orca and his sidekicks prepare to carry out the final lesson for those present, stating that if they succeed. Eventually, they pass the exams and obtain their licenses.

While out on the streets with All Might, chaos breaks out in the city because of villains stealing from the public. Katsuki and Shoto were eager to intervene while All Might tells them to analyze the situation before leaping into action. The students tell him they can handle it. All Might tries to dissuade them since they've only just earned their provisional licenses, but they pay no heed and attack the villains nonetheless, making use of their new privileges.

Shoto creates an ice wall to stop the villains, but their leader breaks through the ice with his carbonation control Quirk, and calls for his gang to run away. Katsuki swiftly knocks out several villains without damaging the stolen items. However, the villain leader fends Katsuki off using high powered jets of carbonated liquid from his gauntlets. Katsuki blasts away a light pole and prevents it from hitting a careless bystander and All Might, and angrily reprimands the former.

Shoto uses his Flashfreeze Heatwave technique and knocks out the leader, angering Katsuki as that was the same move he used on Izuku during the Sports Festival. Katsuki confirms that none of the stolen belongings were damaged and that no bystanders were hurt. All Might, accompanied by Slidin' Go, praise the boys' actions, and they notice that the villain's gauntlets have exploded and disintegrated. Slidin' Go notes that that is expected from inferior black market products.

Later, Katsuki and Shoto returns to the dorms and finds out that it's dark and quiet. Then they got a surprise from Class 1A, congratulating them for getting their licenses. Izuku is excited that they'll do hero work together, but it irritates Katsuki.

My Hero Academia: Heroes: Rising
During fall, the Hero Public Safety Commission devises the Hero Work Recommendation Project, to help to train the new generation of Heroes due to All Might retirement. Weeks go by, and shortly after winter begins, after the Hero Interview Training, Class 1-A is sent to Nabu Island, a remote place in southern Japan. The Pro Heroes who protected the island are about to retire, so the students will take care of the place, performing duties as real heroes acting like their own "Hero Office", until the arrival of new Pro Heroes.

Because Nabu Island is quite isolated from the rest of the country, and therefore far from any villain activity, there has been no notable incident since the last thirty years. For this reason, their work on the island basically involve mostly minor deeds. Because of this, Katsuki hasn't done any work upon arriving on the island, and chooses to stay at U.A. Agency, waiting for an actual villain to show up.

One night, Katsuki sees Izuku training while coming back from his patrol, and tells him to hurry up and master his Quirk. They have an exchange over who will be the No. 1 Hero before it's interrupted by Katsuma Shimano. The young boy tells them a villain has appeared. Izuku is surprised by the presence of a villain before Katsuki pushes him aside, demanding Katsuma to explain himself better.

Katsuki rushes over to where Katsuma said the villain is located, carrying the little kid and being followed by Izuku. Katsuma tells him he saw the villain at the ancient castle ruins located in Mount Shiroyama, on a smaller island next to Nabu. Katsuki arrives on scene first to confront the villain: a giant praying mantis wreaking havoc on the side of the hill. Katsuki uses Stun Grenade to blind it, but he notices something wrong and stops attacking. Izuku arrives shortly afterward and sees the praying mantis attacking Katsuki, but it phases through him. Katsuki generates a huge explosion that makes Mahoro Shimano fall from her hiding place. The giant mantis disappears, confirming Katsuki's suspicions that the monster was fake because there was no shadow beneath it. The creature was created by Mahoro's Quirk: Hologram.

An infuriated Katsuki shouts to the girl if she is mocking him, and says that he is aiming to be the next Number 1 hero, so he doesn't have time for pranks. Izuku restrains Katsuki out of fear that he may hurt the kids, and Mahoro and Katsuma scurry out of there while Katsuki struggles to get Izuku off him. The next morning, Katsuki overhears Katsuma apologizing to Izuku, and learns that Mahoro thinks that hero work is dangerous, so she wants to discourage him from becoming one. He also listens to how Mahoro and Katsuma's mother passed away when they were young and that their father is always working, which is why Mahoro is overprotective of her brother.

Later in the day, Katsuki picked up the phone in Class 1-A's hero office, and hears Mahoro trying to warn them that villains have arrived. Katsuki doesn't believe her and tries to hang up, but Izuku takes the phone to listen, only for the phone service to be cut off. After word spreads that villains have indeed invaded Nabu Island, Katsuki, Eijiro, and Denki head over to the shopping district to intercept the villain. The three rescue Yuga and Minoru just in time, and engage against Mummy and his mummified puppets.

During the battle, Mummy manages to wrap his bandages around Katsuki and control his costume. He proves too powerful for Eijiro and Denki, but Katsuki detonates one of his Grenadier Bracers and frees himself. He swiftly dodges Mummy's attacks and knocks him out by releasing a powerful explosion at point blank range. He then heads off to find more villains.

Katsuki notices a beacon in the form of an illusion of Izuku created by Mahoro, and engages combat with Nine. He finds out about Nine's multiple Quirks, comparing him to All For One. With this in mind, Katsuki outsmarts the villain and tries to attack close up, but is caught by surprise and pinned down by Nine's Hydra Quirk. Izuku recovers and tries to attack Nine, but he and Katsuki are hit by a massive lightning strike summoned by Nine, which also caused a major blackout throughout Nabu Island.

Nine goes after Katsuma and Mahoro, but then suffers from his cell degeneration disease and is unable to continue fighting. Slice arrives to help Nine and attempts to take Katsuma, but is distracted by a swarm of crows summoned by Koji Koda. While the villains are distracted, Mezo, Ochaco, and Tsuyu take the wounded Izuku and Katsuki and the children to safety.

While they were unconscious, Katsuki and Izuku were being unsuccessfully healed by the doctors before Katsuma joins in and accelerates their healing using his Cell Activation Quirk. After regaining consciousness, Katsuki and Izuku join their class, surprising them. Izuku tells Katsuma that he has an amazing Quirk and should not give it up to the villains, while Katsuki tells the class that all they have to do is crush the villains.

Inspired by their words, Class 1-A unanimously agree to fight to protect the island. After devising a plan, Class 1-A await the villains on Mount Shiroyama the next morning, with Katsuki insisting that they will definitely win.

As Nine defeated several students on his way to Katsuma, Katsuki and Izuku intercepted the villain, and fight him in a way that would make him overuse his Quirks, weakening him. During a barrage of Delaware Smash Air Force and AP Shots, Katsuki catches Izuku midair and launches him back at Nine with an Explode-A-Pult.

Katsuki and Izuku have a hard time fighting against Nine's Air Wall and Bullet Laser Quirks and are knocked into a wall, but seemingly find an opening when he starts stumbling, indicating his disease taking effect. However, Nine takes a heavy dose of an empowering drug and summons a massive lightning strike, seemingly vaporizing Izuku and Katsuki. Unbeknownst to the villain, Denki Kaminari acted as a lightning rod and absorbed the lightning, so the two survived.

Izuku and Katsuki arrive just in time to save Katsuma and Mahoro from Nine, and overwhelm him with a combination of attacks. On the verge of defeat, Nine uses up the last of the drugs in his life-support system, and summons a massive fire tornado and lightning storm with his enhanced Weather Manipulation Quirk. Izuku boosts his Quirk to reach 100% and uses his Detroit Smash, while Katsuki uses his Howitzer Impact, but the two are not strong enough to stop Nine. Nine severely wounds Izuku and Katsuki, and begins to crush them with his Hydra Quirk.

In an act of desperation, Izuku makes a daring gamble and transfers One For All to Katsuki. By doing so, the both of them are able to break away from Nine's grip. Katsuki asks if Izuku is okay with letting his dream go like this, and he responds that there is no other way to save and win. The infuriated Nine attempts to kill them by summoning a massive storm, but the two heroes stop the tornado by using Detroit Smash at 100%. Nine is astonished, but refuses to give up, and engages an intense battle with Katsuki and Izuku. Katsuki uses Explosion in conjunction with One For All to weaken Nine, and, after a lengthy battle, defeat Nine using Explosion and a St. Louis Smash. Both of them pass out, and the last embers of One For All are extinguished in Izuku.

However, One For All still retained itself inside Izuku. Upon waking up, Katsuki gets amnesia and doesn't remember using One For All, and is angrily confused at why his arms are busted up. He is healed by Recovery Girl, and stays with his class to repair the damage done on the island until the Public Safety Commission suspends the program and orders them to be sent home. With the island being repaired by the military and the heroes, Class 1-A boards a ferry to leave. As they leave, they see Katsuma and Mahoro, who are reunited with their father, saying their goodbyes to Class 1-A. Katsuki hears Katsuma's promise that he will get stronger and Izuku telling him that he will be waiting for him at U.A. High School.

Endeavor Agency Arc
At Class 1-A's dorms, both Katsuki and Shoto are interviewed for their outstanding hero behavior during the time when they both took out the wannabe villains. Katsuki is particularly irritated when a reporter asks if Katsuki and Shoto are good friends and when Shoto casually confirms it.

Afterwards, Katsuki appears irritated that the interview staff had cut him out from the interview. Some of his classmates laugh off at the interview only showing Shoto's face instead of Katsuki's. His classmates remark on the no surprise with his behavior. Later on, Katsuki shows disgust over Izuku being happy about his slow development of Blackwhip.

Over the next several days, the Hero Work Recommendation Project takes place. Shortly after returning from Nabu Island, Katsuki and the rest of Class 1-A celebrate Christmas with a party before they go over the topic of the impending Work-Studies, Katsuki is asked by Eijiro if he is heading back to Best Jeanist, to which he replies that he still does not know, while remembering the news about Jeanist's disappearance.

Katsuki soon remembers when he did his Hero Agency Internship with him and when Best Jeanist asked him about his hero name and told him that an alias represents what he wants to be and what he ought to be, so he asks him that when he become a second-year student and received his Provisional Hero License, return to him and tells him his name. After the party is over, Katsuki and Izuku are approached by Shoto who overheard that they have no where to go for their Work-Studies. Shoto asks them if they would be interested in coming with him to intern at his father's agency.

Katsuki and the others meet with Endeavor, the current number one hero doesn't hesitate to tell him or Izuku that he only accepted them because his son asked him to, and he would have preferred Shoto to come alone. Hearing this, Katsuki bluntly insults the pro hero who is quite irritated but thinking back to how All Might compared him and Endeavor, Katsuki tells him that he is looking forward to the training since he is number one among the heroes. Suddenly, Endeavor runs off saying that he won't be wasting time training others than Shoto, telling them that if they want to learn then stay behind him, only to be surprised to see them already in their gear, ready for action. Katsuki hears Endeavor repeat his order to stay behind him. A sonic boom goes off in the city while the boys try to keep up with their new employer. Katsuki complains that Endeavor took off before anyone even noticed the commotion, which takes more than just speed and the hero berates him for not having the fortitude required.

They found that a villain known as Starservant is causing panic with his manipulation Quirk. Endeavor's intervention forces the villain to flee flees down an alley and calls his minions, being chased by Endeavor. When they come out of the other end, Starservant's minions are ready to attack. The next moment, Izuku and Katsuki take on the minions directly. However, in an even faster flash, Hawks appears and effortlessly dispatches them with his feathers.

After the villains are arrested, Hawks briefly chats with the three interns with Katsuki is not too fazed at meeting the second best hero and complains about him taking the action. Endeavor asks Hawks what he wants, to which Hawks deflects the question completely before promoting the Paranormal Liberation Front's book. Seeing how Japan's No. 2 hero recommends the book, Izuku expresses his desire to read it too, and Hawks gives him, Shoto and Katsuki extra copies that he carried with him, before leaving.

Once they arrive at Endeavor Hero Agency, Katsuki meets several of Endeavor's Sidekicks, who give them a hot welcome. After Izuku notices that the place is busy with their large number of requests, Katsuki wants to start training now, but the sidekick tells that they have to wait for Endeavor's orders, who has gone to his office to read the book Hawks gave him. After a while, he leaves his office and tells three students that he will train them personally.

In the agency's gym, Endeavor asks his trainees what they want to achieve. Izuku says wants to be able to control his power and use it with maximum performance. Endeavor recalls that he has a super-strength Quirk that is powerful but self-destructive. Katsuki is confused on how Endeavor understands Izuku's muttering.

After listening to Katsuki and Shoto, Endeavor starts the Work-Studies. He explains that his agency is governed by three fundamentals: Rescue, Evacuation, and Battle. With his training, they will make these processes their M.O. Endeavor ends the lesson by telling Izuku, Shoto, and Katsuki that, during the winter break, their task is to beat a villain faster than him, even if only once.

During the following days, the three students try to surpass Endeavor's test, but the veteran hero always manages to catch the villains before them. Endeavor does not hesitate to criticize them, telling them in what facets they need to improve.

A week later, Endeavor brings Shoto, Izuku, and Katsuki over to his house for dinner per his daughter's suggestion. Dinner starts well, but Katsuki becomes irritated with Izuku praising the food Fuyumi Todoroki cooked, but things ended up being quite awkward, due to the complicated relationship between Endeavor and his children, and specifically due to Natsuo Todoroki's resentment towards his father, and after he finishes, he quickly leaves, unable to sit near his father. Katsuki is also aware of the situation, and when he asks him if he knew about Shoto's past, to which he reveals he was listening when the two of them were talking during the Sports Festival.

Although it is clear that Endeavor regrets what he did and now tries to do his best for his family, it's hard for his children to forgive him. Izuku tells Shoto that he feels he's getting ready to forgive Endeavor, as he feels that if Shoto truly hated him, it would be fine to not forgive him, but Izuku voices his thoughts on that Shoto is a very kind person waiting for the right moment.

Fuyumi and Shoto tell Katsuki and Izuku about Toya, and how close he was to Natsuo, to the point he blames Endeavor for Toya's death. Fuyumi then says that an incident occurred after their mother was hospitalized, which only made things worse. Although family relationships have improved a lot, there are still many wounds to heal. Endeavor then comes in and tells the three of them that he'll be taking them to U.A. High School. As the three of them thank Fuyumi for the meal, Fuyumi thanks Izuku for being Shoto's friend.

While Endeavor's chauffeur drives them back to the U.A, Endeavor tells the boys that they will have to keep going to his Agency to continue the training on weekdays and weekends if their schedule allows. Just then a villain appears in the middle of the road, holding Natsuo as a hostage and calls out Endeavor to come to face him. Endeavor leaps out the car to save his son. The villain introduces himself as Ending, is obsessed with Endeavor and wants him to kill him.

Ending takes a step back when he sees the interns, giving Endeavor an opportunity to attack the off-balance villain. However, when he sees Natsuo being held in front of Ending, Endeavor slows down, not wanting to endanger him, and allowing the three students to pass him in order to rescue Natsuo and defeat the villain. Disappointed, Ending threats to increase the death toll if the Flame Hero doesn't kill him, sending several incoming cars into the air. He also puts Natsuo directly in the path of a car but Katsuki rescues him in an instant

As Natsuo is held in the grasp of Ending, Katsuki successfully condenses and releases his Quirk while declaring that there will be no corpses if he can help it. With Natsuo safe, Katsuki watches Shoto attack Ending and defeats. Katsuki is then caught in the embrace of Endeavor and Natsuo after the hero is relieved about his son.

After escaping Endeavor's embrace and subduing Ending, Katsuki boasts about the fact that they managed to subdue a villain faster than Endeavor, but to Katsuki's surprise and annoyance, Endeavor doesn't object to Katsuki's statement, actually complimenting him and the other two for their speed and picking up his slack. He stands awkwardly as Endeavor and his son talk. Later, when Ending is taken by the authorities, Natsuo thanks Katsuki and asks for his hero name. Izuku assumes it's just Katsuki, but his childhood friend says it's not and that he's already chosen a hero name. Izuku is curious to know what it is, but Katsuki refuses to reveal it, telling Izuku to go fall in a hole, adding that there's someone else he has to tell first.

My Hero Academia: World Heroes' Mission
On the occasion of an important mission organized by the World Heroes Association, Endeavor takes his three Work-Study trainees to a facility to test them and determine if they are qualified to participate. The test is that in a time limit of three minutes, they must all land an attack to Endeavor, so they can participate in the mission of global scale. Katsuki loves the idea of having the chance to fight Japan's Number 1 hero.

As soon as the test begins, Katsuki is the first to attack him, trying to go for an attack from above because of Endeavor's blindspot, but Endeavor just blasts him away, with Katsuki noting his incredible reflexes. After neither Shoto nor Izuku manage to hit him, the three students attack him at once, but Endeavor use his Hellflame Quirk to blast them away. The examiners ask the hero to go easy on them as they don't expect them to be a match for him, but Endeavor replies to them not to underestimate his trainees.

The three students get up, more determined than ever not to fail again. Using his explosions to move faster, Katsuki gets behind Endeavor and attempts to hit him, which he just barely dodges. Shoto shoots fire directly at him which is enough for Izuku to land an attack on him before the time limit expires. Although they've passed the test, Katsuki is frustrated because he didn't get the chance to defeat Endeavor, declaring he would've got him if it went on for longer.

Due to the nature of the mission they are going to participate in, they are taken to a special room to create stealth-oriented suits. Katsuki designs his suit, being especially detailed with the gauntlets. He is also annoyed by Izuku's over-enthusiasm and his absurd initial idea of wearing a cape on a stealth mission, deleting his drawing and forcing him to design a more suitable one.

With everything ready, Katsuki travels with several members of the Endeavor Agency to Otheon, where they meet with other international heroes who also participate. While they fly in airplanes, they are explained what the mission consists of. Flect Turn, the leader the Humarise, a cult that considers that Quirks will cause the doom of humanity, had detonated a Trigger Bomb in a city, releasing gas composed of Ideotrigger that made its citizens lose control of their Quirks, destroying the city and causing a large number of victims.

Because of this, the World Heroes Association organizes a worldwide operation to attack the 25 branches that Humarise has in different countries. The Otheon task force, led by Endeavor, aims to storm Humarise's headquarters in that country. The force is divided into two groups, Team A in charge of finding the Trigger Bombs, and Team B in charge of gaining control of the facility and capturing Flect Turn; Katsuki is in the latter.

When the raid begins, many Humarise cultists come out to confront them. Shoto reminds Katsuki to hold back as most of the members are Quirkless, as Katsuki utilizes his Stun Grenade to blind the members and Shoto freezing them to immobilize their movement, with Katsuki annoyed by Shoto's word of caution. After a few minutes of fighting, all cultists are defeated with no hero casualties, however Flect Turn is missing and the Trigger Bombs are nowhere. The situation is the same in the branches of other countries, so the Association director orders all the teams to be placed on standby.

Endeavor's team stay in a hotel in the capital city, using it as a temporary base. Since Izuku, Katsuki, and Shoto are the lowest ranking members of the team, they have to make some errands for the heroes, much to Katsuki's annoyance and frustration. On their way back from a grocery store, they discuss Humarise, whom Katsuki considers to be a bunch of wackos obsessed with a delusion.

Suddenly, they spot a jewel robbery taking place nearby and respond quickly. The villains see them and split up, with Katsuki chasing after the Bomb Villain, while Izuku and Shoto go after the Gale Villain, who carries a briefcase with the stolen loot. The Bomb Villain tries to get rid of him and attacks with his Fire Cracker Quirk, but Katsuki dodges the blast and counters with his own explosive Quirk, defeating the robber. Shoto also defeats the other robber, but they lose track of Izuku when he chases a third one.

After the robbery fiasco, Katsuki returns to the hotel, with Endeavor reprimanding him and Shoto for disobeying direct orders to standby and instead chase after a petty robbery. Katsuki sarcastically comments in response that they never learned to assign importance to jobs during their Work Studies, a comment that annoys Endeavor.

At that moment, Izuku contacts Shoto, and as he's about to tell him what had happened to him, Clair Voyance brings them to the television where the news agency publicly announces to the world that Izuku is accused of a mass murder of twelve people, much to Katsuki, Shoto, and Endeavor's shock. Shoto tells Izuku what he just saw on the news, and advises him to stay hidden while they try to clarify what happened.

Shoto later receives a hard coded message from Izuku telling him that he is heading to the neighboring country of Klayd. Clair also reports that near the place where Izuku was chasing the thief, there was a car accident caused, driven by a Humarise deserter who was attacked, and that the briefcase with the stolen jewels was also found nearby. Realizing what is happening, Shoto takes Katsuki with him. As soon as they leave the hotel, several policemen attempt to trail them, but both manage to give him the slip.

The two board the train to the Otheon-Klayd border, and during the trip they recap the whole situation, coming to the conclusion that during the chase, Izuku and the thief he was chasing, mistakenly took a briefcase related to Humarise, thinking it was the one with the jewels, and that the reason why the police persecute them is because several of its members are allied with the criminal organization.

Katsuki and Shoto arrive at the border, which is guarded by a large police force. Suddenly they see a battle in the mountains near the border, and when they go there, they see that Izuku and the person accompanying him are being attacked from a helicopter by two Humarise agents, Beros and Sidero.

Shoto saves the man, Rody Soul's, life and defeats Sidero, while Katsuki fights Beros, damaging the helicopter with his blasts. He continues to battle until she runs out of arrows, so he orders her to surrender. However, before allowing herself to be captured, Beros jumps off a cliff before the helicopter crashes, an action that leaves everyone present stunned.

Once the battle is over, Izuku meets with Shoto and Katsuki, introducing the two to Rody, as they all catch up on the situation. Izuku realizes that the battle caused a secret compartment in the briefcase to open. After getting far enough away from the battlefield, they find the compartment concealed a small puzzle-box.

The three students try to solve it without success, and Katsuki ops to destroy the box to know what is inside, but Rody remembers that it is exactly like one his father had given him years ago, and manages to solve the puzzle and open the box, uncovering inside a strange device and a microSD.

The four decide to cross the border to Klayd and investigate the information it contains. Izuku is shocked at how many files he doesn't know what to do, but Katsuki looks for the newest file, finding in it an audio of Alan Kay, a Humarise deserter. Alan reveals that Flect Turn had prepared a trap in order to eliminate the world's top Heroes, using the Trigger Bombs. Fortunately, he reveals that the device is a key that defuses all the bombs, created by his colleague, Eddie Soul, at the cost of his life.

However, the situation becomes desperate as Humarise broadcasts to the entire world that they have planted over twenty-five countries with the Trigger bombs and plan to detonate all of them in two hours, creating massive panic and hysteria in the major cities being targeted.

With no backup and running out of time, the four of them decide to take the disarming device to disable the bombs. Katsuki is able to figure out the exact location of Humarise's true home base in the SD card, and with Rody flying them there on a plane, they head out to shut down the bombs. The three heroes gear up in their original costumes and launch a direct assault on Humarise's base.

Dozens of Humarise's followers start shooting at them once they see them, but Katsuki retaliates with his Quirk blasts, defeating several of them. Once they land, Katsuki takes care of the rest of the soldiers while Izuku and Shoto enter the base to stop the countdown. Once he defeats the last of the defenders, Katsuki faces a new threat, the Serpenters Twins.

Katsuki questions why they are following Humarise given that they are Quirk users. The Serpenters claim that they will be spared in the upcoming Quirk cull, so Katsuki replies that it just means they are opportunistic cowards, and starts attacking them.

The Twins prove to be very dangerous opponents, as they are not only fast and agile, but also their Sword Kill Quirks allow them to cut through even the biggest explosions. Katsuki is wounded and slashed several times, but continues to attack them, until he manages to outsmart them, causing them to become trapped under the rubble of a column he knocks down.

Unfortunately, the Serpenters inject themselves with Trigger to break out of the rubble, becoming even more powerful than before. They easily overwhelm Katsuki, slashing and slicing him mercilessly, while he student is barely able to fight back. He is about to die from his injuries, yet he refuses to give up and in the end he finds a way to defeat them.

After being slashed several times, Katsuki manages to grab their bladed whips and slams the twins against the wall, attacking them with his Grenadier Bracers to make sure they are well embedded, and defeats them definitively with his Ultimate Move: Howitzer Impact. Having achieved victory, Katsuki stands tall, right arm in the air with thumbs down, before collapsing because of the extenuation and blood loss, losing consciousness.

During the time he is unconscious, his other teammates achieved their goals, with Izuku defeating Flect Turn and Rody managing to deactivates the Trigger Bombs Control System just in time, saving the lives of millions of people in the world. Humarise is dismantled and all of its members are sent to prison.

Katsuki, Izuku, Rody, and Shoto are rescued and taken to a hospital, where they remain until they recover from their injuries. Recovery Girl herself goes to the hospital to heal them using her Quirk, much to Katsuki's chagrin. After their mission was successfully completed, the Otheon team leaves the country, as they notice Izuku saying his goodbyes to Rody.

The students of Class 1-A reunite back at U.A. in relief and celebration over saving the world, with Katsuki as his usual aloof self.

Paranormal Liberation War Arc
Upon returning to class, Class 1-A heads to Ground Alpha to demonstrate what they learned from their work study experiences. In the locker room, Katsuki hits Izuku in the head with his mask out of disgust, as Izuku's control over Blackwhip was praised by his classmates. Outside, the class is surprised to see that All Might will be teaching the class, as Shota has been urgently called to Tartarus that day.

The Endeavor Agency trio demonstrate at last, with Katsuki showing off his improved abilities, Shoto his enhanced speed, and Izuku his improved control over Blackwhip. Later in the Teachers Lounge, All Might meets with Katsuki and Izuku. He congratulates the two on their improvements, and places a notebook on the table, which contains All Might's research into the past One For All users.

Katsuki looks through All Might's research, and notes that the fifth user was Daigoro Banjo a.k.a. Lariat, whom possessed the Blackwhip Quirk. At first, Katsuki looks down on the original users and their Quirks as being weak, but All Might tells him that All For One killed them as soon as he could since they defied his will, leaving them with no choice but to pass on their Quirks. Katsuki asks Izuku what Quirk he will unlock next, and Izuku answers with Float, the Quirk of Nana. Katsuki denounces him since he is skilled enough with Explosion that he can go airborne, leading the two to have an argument, to All Might's humor.

As Izuku trains with his classmates to prepare his Quirks, Katsuki assists him with a training exercise called "Catch Kacchan With Blackwhip" to catch him with Blackwhip, only for Izuku to lose every time with Katsuki's explosions leaving an afro on his head. Later, Katsuki tells All Might that he can't keep his secrets forever, and All Might tells him that great power puts others at risk and it isn't just the wicked who seek power. Katsuki questions All Might about leaving out some of the information in the notebook, and dodging the subject when he asked him previously.

All Might reasons that they're both worried for Izuku due to his own insecurities, and Katsuki replies that he ignored his own weaknesses so he bullied him in the past. All Might asks if Katsuki is doing this to atone and he says Izuku won't see it that way, but All Might soothes him by comparing his relationship with Izuku to his own relationship with Endeavor, saying he'll get a chance to talk eventually.

At some point during this time, Katsuki accompanies his fellow trainees on the mission to Otheon to stop Humarise.

Months later, Katsuki accompanied the Pro Heroes and the other students of U.A. in the Paranormal Liberation War, originally in Burnin's rear guard of Team Endeavor, tasked with evacuating the civilians in Jaku City. Katsuki complains about being in the back, arguing with Shoto and Tenya. When Burnin receives word that the front line has started to move, she signals the students to head out into the City to evacuate the civilians.

A few minutes later, they notice the ambulances carrying the evacuated civilians away from the hospital where Endeavor's team is fighting, and are instructed to begin escorting the civilians. Katsuki grumbles at having to help with the evacuation, wanting to fight the Villains too, but still proceeds to ring the nearest doorbell, yelling the people to move it.

The evacuation goes smoothly. The U.A. students each do their part, with Katsuki telling the civilians to take the shuttles out of the city, and one of them offers him a chocolate bun as a thank you, though he angrily yells it will make his mouth dry and they need to keep going. Then, he notices Izuku clutching his stomach, and yells at him for slacking off. In actuality, Izuku is sensing that something horrible is about to happen.

Suddenly, at the hospital, Tomura Shigaraki wakes up with his Decay stronger than before, and uses it to destroy the place, killing dozens of heroes, and the decaying wave spreads to Jaku City, crumbling the entire city and forcing everyone to flee. Katsuki saves as many civilians as he can while running away from the destruction as quickly as possible.

The backup team manages to get far enough away and get to safety. During Endeavor's battle with Tomura, he and Deku both overhear Endeavor mention "One For All" over the comms, realizing that Tomura will now be directly targeting Deku. Seeing Deku starting to worry, Katsuki tells him that everyone will want to look out for him, since being a Hero means protecting everyone, and he understands the safety of the people is their top priority, so they need to leave. The two make up an excuse to their fellow students about forgetting something, as they contact Endeavor to tell him Tomura is going after Deku, with Katsuki yelling that he'll crush him.

As the two continue moving forward toward an abandoned area of the city, Deku suddenly asks why Katsuki is with him, causing him to snap back that in a situation like this, he's the only one who understands quickly enough to act fast enough. Deku thanks for his help, but Katsuki retorts he isn't doing it for him, having a score to settle with Tomura from getting kidnapped and leading to All Might's retirement; One For All is just the bait. He then starts to think about how much Deku has grown through their internship as well as All Might's training, noting that no matter how much he continues to climb, he'll make sure to always work to keep ahead.

Tomura finally catches up to Izuku and Katsuki, demanding the former to give One For All to him as he reaches his hand out to grab him. Both Katsuki and Izuku feel the terrible aura emanating from Tomura and experience the image of their deaths, seeing both disintegrating. They are saved at the last minute by Gran Torino, who takes them to a safe spot. Deku tries to introduce Katsuki to Gran Torino, who reveals All Might already told him that he knows about One For All.

Katsuki asks why he dropped them off so far away, as he explains that not only is Tomura's Decay so dangerous that touching debris could disintegrate you, but that he also possesses incredible power and speed, on top of All For One's Quirk and additional Quirks, telling them to let the Pro Heroes handle the mess, especially now that they have Eraser Head using his Erasure to weaken him. He also reminds Deku that him losing One For All would be the "worst case scenario".

Suddenly, to all three of their shock, a hoard of Nomu, dubbed the "Near High-Ends", suddenly emerge from the wreckage and begin to attack the incoming Heroes arriving to backup the team currently fighting Tomura. Gran Torino leaves to assist Endeavor and Ryukyu, but seeing the Heroes undermanned, and seeing Eraser Head in danger, Deku and Katsuki blast their way back to the battlefield, with Deku stopping Tomura and Katsuki declaring it's their turn to save him.

After Deku tells them they need all the help they can get, and that losing their teacher is the real "worst case scenario", Katsuki unleashes an AP Shot: Auto-Cannon on Tomura, but he disregards them as mere fireworks as they hit him. Deku tries using Blackwhip to hold him back but Tomura pulls him closer while telling Katsuki face-to-face that he isn't interested in him at the moment. Endeavor returns and blasts Tomura away from the two students, asking them where Shoto is, and answering it's just them present.

Endeavor tells Deku and Katsuki that they can act without his direction in this situation, but he wants them to support Eraser Head and protect each other. After being attacked by both Endeavor and Gran Torino, Tomura manages to make a straight dash towards Deku but is surprised by Katsuki appearing above him as he yells out that Deku was baiting him out so he could unleash a huge explosion from his gauntlets, giving Deku the opening to kick him away, distracting him long enough for Endeavor to go at him with a Vanishing Fist to the gut.

Even after all the punishment brought toward him, Tomura still stands and continues to resist. During their scuffle, Gran Torino is severely injured by Tomura, while Deku and Ryukyu manage to restrain him from going after Eraser Head. However, unknowingly to everyone, Tomura was in possession of two Quirk-Destroying bullets and prepares to fire them at Eraser Head and Endeavor.

Katsuki manages to destroy the bullet aimed at Endeavor, but fails to stop the other as it hits his leg, but Eraser Head manages to cut it off before the effect could take place. Shoto then arrives to help them keep him at bay, but he manages to reach Eraser Head and injure him enough for him to blink, giving Tomura all his Quirks back.

Katsuki gets increasingly irritated at being unable to do anything to help, and just as Tomura has the chance to Decay all the Heroes in his vicinity, Deku suddenly activates Float while using Blackwhip to carry all of the Heroes out of range. Katsuki worriedly yells to Deku to keep his distance, but the latter tells him that he is the only one who can stop Tomura from reaching the ground. As the two clash, Katsuki worries that Deku has a high risk of dying whether by Tomura's hand or expanding his body with his own Quirks.

He comes up with a plan using both Shoto and Endeavor, flying the two up to help Deku, with Katsuki thinking about how he used to believe that One For All was a cursed power until seeing how useful it was when All Might and Deku used it for their heroic deeds, while also witnessing the intense self-harm the full power of the Quirk is doing to him right now.

He throws Endeavor to Tomura, unleashing a Prominence Burn that nearly defeats him, until All For One surprisingly possesses Tomura's body, with the villain unleashing tendrils in order to attack Deku and steal One For All. Without thinking, Katsuki intercepts the attack and saves Deku's life, just like he did for him so long ago.

Katsuki tells the shocked Deku not to play hero all by himself, and his falling self is caught by Shoto. Enraged by Tomura hurting his allies and friends, Deku snaps and breaks his way through to Tomura, accidentally giving him the chance to steal One For All. Tomura, however, is unable to steal One For All, and the action stuns both him and Deku.

Ingenium and Nejire chan arrive on the scene to help. While Ingenium takes care of the injured Katsuki and Endeavor, Nejire Chan fights alongside Shoto against Tomura. Unfortunately, the heroes are met by Gigantomachia and the League on his back. As Dabi prepares to attack the heroes after revealing his identity as Toya Todoroki, Best Jeanist falls from a plane and restrains the villains with wires.

Katsuki smirks, seeing his former employer alive and active. Katsuki blasts his way to help Best Jeanist and Lemillion, and fights off the Nomu that had been summoned to assist in the fight. Katsuki thinks that the explosions from the time he saved Deku were stronger, faster and more condensed than his usual ones. He realizes that once he's feeling a sensation of a total crisis, his explosions rise in power.

Thanks to this, his mobility when propelling himself with the explosions is increased and he manages to arrive in time to support Best Jeanist against the Nomu, along with Mirio, Ingenium and Nejire Chan. Katsuki then speaks to Best Jeanist where he then reveals his official hero name: Great Explosion Murder God Dynamight. The name is met with disapproving thoughts, but amuses Lemillion, irritating Katsuki.

Despite his injuries, Katsuki continues to fight the creatures to protect his mentor. During the fight he is saved by Tenya, who yells at him to back off as he is in no condition to continue fighting. Katsuki is frustrated not only because he can't answer him but also because he is forced to admit to himself that his classmate is right, though he continues protecting Best Jeanist.

As Gigantomachia weakens, Mr. Compress gouges himself to escape Best Jeanist's clutches, and takes Spinner and Tomura with him to open ground. Katsuki becomes too weak to stop Tomura/All For One and the League from escaping and passes out, and is admitted to Central Hospital.

Two days after Tomura/All For One breaks out the convicts in Tartarus and prisons all over Japan, Katsuki wakes up, seemingly back to his naturally irritated state, making the visiting students relieved. Katsuki then asks them if everyone, including Izuku, Shoto, Endeavor, Shota, and Nejire, are alright. He notices grim looks on their faces and demands to know what is going on. They explain the situation to him, that his classmates have already woken up, but Izuku is still unconscious.

Katsuki gets out of his bed and starts running down the hallway to get to Izuku, with Rikido and Minoru trying to stop him. He angrily proclaims that if Izuku dies, he will kill him. Katsuki is eventually carried off by Tsuyu, Minoru, and Rikido, angrily demanding to speak to Izuku, who is still unconscious. He notices Best Jeanist and Hawks walking by to talk to Izuku about One For All.