Nemuri Kayama/Synopsis

History
Nemuri was once a student at U.A. High School. At one point, she participated in the Hero Work-Studies at the Purple Revolution Agency, being a trainee to His Purple Highness. During her third year, she began a friendship with the second year students Shota Aizawa, Hizashi Yamada, and Oboro Shirakumo.

It all started on her way home from her Work-Study. She went to school to do some paperwork and stopped by the rooftops because it was one of her favorite spots. Once there, she found the three students eating their lunch, and she warned them that the roofs are off-limits to students. Yet while it seemed that she was going to admonish them, she actually praised them for their rebellious attitudes.

The boys were surprised to find her there. Shota asked her about her hero costume since it was too revealing, to the point she was almost naked. Although she knew her costume would be scorned and questioned, she told them that it was bold yet practical, as it supported both her Quirk and moves, and she didn't feel ashamed for wearing it. In fact, she was convinced that she would change the opinion of the Japanese in one year's time. Little did she know that soon, her costume would lead the government to put forward the "Hero Costume Skin Exposure Limitation Act."

Nemuri stopped talking about herself and spotted the cat Shota was holding. Oboro explained that he and Shota were taking care of it when Nemuri said they really shouldn't have animals at school and swiped the cat away. Nemuri asked for the name of the cat, and as it did not yet have one, decided to name it Sushi after asking the boys what their favorite food was. She said she would keep the kitten temporarily until the trio found him a proper home, because she planned to leave home after graduation and thus wouldn't be in any place to care for it. Then, she left the roof with the kitten, and Oboro stated she will end up keeping him.

The next day, Nemuri returned to the roof to meet with Shota and Oboro, who were eating. After informing them that Sushi was doing well, she told them she had a proposition. Knowing that both Shota and Oboro were not yet assigned to a Hero Office to participate in the Work Studies, she informed them that her boss was willing to take on anyone.

Shota and Oboro accepted her offer and began their Work Studies with His Purple Highness, forming the Team Purple Revolution. A day on the field, a robbery was happening when Oboro and Nemuri entered the scene, forcing the Robber Villain to use his Smoke Quirk to escape. Oboro wanted to chase after him, but Nemuri stopped him, arguing that the smoke could be toxic and they should prioritize evacuating the citizens. Oboro yelled at Shota to catch the thief, but he managed to escape thanks to his Quirk.

The three students apologized to His Purple Highness for failing, but the hero praised them and gave the trio his feedback about what they should improve, especially Shota. Days later, they met the Robber Villain again, and this time they managed to capture him.

For a while, the students of class 2-A returned to the U.A. to show their progress and participate in a Two on Two Battle Training together with class 2-B. After the exercise, Nemuri met Shota, Oboro, and Hizashi hanging out on the rooftop again, talking about their plans to open an agency together once they graduate. Nemuri admires the youths bantering and Oboro asked her to join them. Nemuri declined the offer, since she already had her own plans once she goes independent, with young people waiting for her. Then, Oboro stated he wouldn't mind waiting on her and would later give her a pair of googles.

After this brief period in the U.A., Nemuri, Oboro, and Shota returned to the Purple Revolution Agency to continue with the Work-Studies. The Purple Revolution team patrolled the streets of Tasomiya Ward in two groups: one formed by Shota and Oboro, and the other by Nemuri and Mr. Purple.

During the patrol, a villain known as Garvey made an appearance, causing great destruction in the city. Nemuri and His Purple Highness witnessed how the hero team Buster Union tried to stop him but were easily defeated by the villain. Midnight used the Hero Network to obtain information and reported to her boss about the villain’s criminal record and his Stock Quirk, showing concern because the data did not indicate that Garvey had as much destruction capacity as he was demonstrating at the time. Mr. Purple ordered Midnight to call for backup and help evacuate the area while he faces the villain to buy time.

His Purple Highness, Shota, and Oboro faced the villain to protect a group of school kids. In the end, Shota was able to defeat the villain alone, but the victory came at a price. Mr. Purple had to be hospitalized for the injuries that he suffered and Nemuri and Shota discovered that their friend, Oboro, had died during the incident while protecting the children.

Nemuri could not help but cry over his death, while Shota and Hizashi were mourning in the place where Oboro had died, not caring about the heavy rain at that moment. After his body was removed from the area, Nemuri told Shota and Hizashi to cover themselves if they didn't want to end up getting sick. Hizashi thanked her for her concern but told them they were fine and continued in the area for hours.

After Oboro's death, Nemuri continued to attend U.A. until she finally graduated and became a Pro Hero. She eventually started her own Hero Office, with her own sidekicks; the Midnight Boys.

Vigilantes Beginnings Arc
Months before she started working as a teacher at the U.A. High School, Nemuri was involved in a series of events caused by a criminal organization known as the Villain Factory, a criminal organization responsible for trafficking Trigger, a drug that boosts Quirk but turns its consumers in violent Instant Villains.

One day, one of the Factory's agents, Kuin Hachisuka, uses her Queen Bee Quirk to inject Trigger into innocent civilians, causing an Instant Villain Outbreak. Detective Naomasa immediately calls for backup. Nemuri and other heroes appear immediately and quickly they suppress the outbreak.

Due to the villain outbreak, where several innocent people were turned into Instant Villains, detective Eizo Tanuma organized a meeting in the Police Station with multiple Pro Heroes who helped to stop the outbreak, to discuss the situation the best action to take, Midnight being one of them.

After the meeting, Midnight approaches Eraser Head, asking about where Present Mic is because he was supposed to be at the meeting. He explains that Present Mic had a cold and could not make it. Midnight scolds Eraser Head on his attire. In response, he teases her saying she should become a teacher or something if she likes counseling others so much.

Much to his chagrin, she tells him that is exactly what she planned on doing. Continuing on she reveals that principal Nezu personally requested her and that she will start next year at U.A. She details in constant innuendos her beliefs on teaching. Aizawa disagrees with her methods and as she began a rebuttal. Then, a villain called Suicide Bomb attacks the police station, threatening to kill everybody. Endeavor still fuming over what has just transpired decides he is going to incinerate the villain.

However, the villain's Quirk will most likely have a volatile reaction to Endeavor's Hellflame. Midnight calls Eraser Head to help resolve the problem before it gets explosive. Eraser Headwraps up the villain and threw him into Midnight, who calms him and passes him out with her Quirk. The Midnight Boys come bursting in asking if Midnight is unharmed. She tells them she is fine and orders them to hand the villain over to police custody.

Midnight returns to her conversation with Shota Aizawa telling him he should also become a teacher because a wide variety of opinions and teaching styles is required to educate the youth. He asks if she is joking about him becoming a teacher because that would be the epitome of irrational. Despite his words, Midnight submits a recommendation for him to the principal, informing Shota the next day about her decision.

Vs. Queen Bee Arc
Weeks later, she is invited by Makoto to participate along with other heroes in a musical event organized by the Marukane. Midnight accepts the invitation. In the greenroom, he meets Present Mic, and asks him about Eraser Head whereabouts. Present Mic replies that Shota told him he would come to the show if he can. Midnight assumes he won't come. As she predicted, Shota cannot attend because he has to face a villain that generates a blackout in the area. Fortunately, Makoto's team fixes the generators and the festival continues, ending up being a success.

Osaka Incident Arc
Several days later, taking advantage of her day off, Nemuri decides to go to Narufest to enjoy the event. To her surprise, she meets Shota Aizawa present at such a bustling event. He responds that he is on duty and stopping by for lunch. Shota asks her why she would be attending on her day off and Nemuri responds that it is because she enjoys such events. Soon, detective Naomasa arrives and Nemuri introduces herself to him, who does not recognize her at first because she did not wear her characteristic hero costume.

Although Naomasa is there to talk to Shota, he decides to include Nemuri in the conversation about Teruo Unagisawa, the villain Shota had captured the night of the festival in Marukame. He tells them that Teruo had been arrested twice, however between his first and second arrests his body was drastically bioengineered, the police had found several other villains with similar alterations with high concentrations of Trigger present in them. The police decided to name this new threat Next-Level Villains

The police suspect that there is an organization behind the distribution of Trigger that is also responsible for the Next-level Villains Shota says that the organization must have some greater goal in mind. Naomasa agrees and asks Shota for his help. At first, Eraser Head is not very sure of participating, because acting as a detective is not his thing, but Nemuri Kayama convinces him to help the police.

Sky Egg Arc
Nemuri helps Naomasa in the investigation. Police found out that there is a new version of the Trigger, that only needs to be ingested to work, and there is groups who are distributing Trigger at mixers, causing several incidents. Originally Naomasa Tsukauchi wanted Shota Aizawa to carry out the mission of arresting the suspects of this practice, but he refused, saying he did not take on assignments that required high-energy and social activity, and instead he recommended Midnight to tackle the task.

It turns out that for the mission to which she was entrusted, she coincides with Koichi and Kazuho, the Vigilantes The Crawler and Pop☆Step respectively. The Mad Hatters invited Koichi to participate in a mixer and Koichi accepted, much to Kazuho's disgust. Later, Midnight has run into Kazuho as the latter is tailing Koichi on his way to the mixer, recognizing her as Pop☆Step who she had met at the first Narufest.

Then, Midnight sees the main suspect of the incidents, Rin Yaritezawa, accompanied by her friend Hina, and outlines a plan to also participate in the mixer together with Kazuho. Midnight telephones the Midnight Boys to distract the other two girls who would join the mixer, getting them to cancel their participation, and so she and Kazuho take their places as "substitutes".

During the mixer, a series of events make Rin fall in love with Koichi, which unleashes Hina’s jealousy and decides to take revenge on Koichi, mixing in his drink a few drops of Trigger. However, due to a number of circumstances, the drinks that she offers to Koichi end up being drinks for other customers of the bar, resulting in them starting to lose control over their quirks.

Midnight uses his Somnambulist Quirk to put everyone to sleep and arresting Hina in the process, who turns out to be responsible for the previous incidents at mixers, by drugging guys to keep them from talking to Rin. The next morning, Midnight is congratulated by Naomasa for the work done, and Eraser Head could not agree more.

Months later, on the occasion of the return of Captain Celebrity to the USA. Makoto decides to organize a farewell show at the Tokyo Sky Egg, inviting several of Japan's most famous heroes to the event, including Midnight and sidekicks. She participates in a pageant along with Mirko, Uwabami, and Ryukyu, while Best Jeanist uses his Quirk to manipulate a large cloth to dress and decorate the heroines.

In the middle of the event, the Tokyo Sky Egg is attacked by creatures known as Bombers, commanded by the villain Number 6, a member of the Villain Factory. The main objective of Number 6 is to kill Captain Celebrity, and to achieve it he orders the bombers to damage the structure, leaving the Captain at his mercy by having to use his strength to prevent the building from collapsing, leaving him completely defenseless to the Bombers attack.

The heroes who were participating in the event decide to organize in two groups: one group goes outside and confronts the enemies, while another group helps the show staff to look after the spectators who had come to enjoy the show without telling them the truth about what is happening, to avoid panic. Midnight is part of this last group.

Thanks to the intervention of the heroes, and the timely arrival of All Might, they manage to avoid a tragedy.

School Days Arc
Weeks after the Sky Egg Bombing, Midnight phones Shota Aizawa to talk about her experience as a teacher at the U.A. and tells him that Hizashi Yamada will start teaching next semester, and the only one missing is him. Shota replies that he has not agreed to be a teacher, but Midnight replies that according to Present Mic he only needs a good shove to take action. Also, she tells Shota that he has been shying away from what really matters. Pissed off at Midnight's words, Shota ends the conversation. Although after re-thinking, he accepts the offer to be a teacher.

Final Performance Arc
About two years after the Sky Egg Bombing, Kazuho was kidnapped by Number 6 and turned into the host for the new Queen Bee. Calling herself Bee☆Pop, she perpetrated several bombings around Naruhata, and Nemuri was nearby by the time she struck again. She saw The Crawler carrying an injured Kazuho in the sky, using his Slide and Glide Quirk to get to a certain location. Nemuri follows Koichi there.

Nemuri arrives in time before Soga Kugisaki could attempt to extract the Queen Bee from Kazuho's left eye, which could potentially worsen her condition. She explains that she is a Pro Hero and a friend of Kazuho, and asks Soga what he is doing. Soga explains that Kazuho is hosting a parasitic bee in her body, so Nemuri offers to help, which Soga agrees to.

Nemuri uses her Quirk to put both Kazuho and the Queen Bee to sleep and explains that all they have to do is take Kazuho to a hospital to receive appropriate medical care. Suddenly, a furious Endeavor arrives to stop Pop☆Step and the Crawler. Nemuri calms down a defensive Soga and reasons with Endeavor, saying that Pop has been captured and that she needs urgent medical care.

Endeavor then asks about the Crawler, to which Nemuri replies that he slipped away, buying enough time to let Koichi escape. Endeavor believes Midnight's statement and allows her to take Kazuho to the hospital, suspecting that there is a larger scheme involved.

At the maximum security hospital where Kazuho was being treated at, Midnight consoles Kazuho's mother before meeting Naomasa inside. Naomasa noted the high security of the hospital and discussed whether it was necessary for Kazuho to be here. Midnight informs him that Soga and his friends were insistent on it.

Since Kazuho was admitted, the hospital had been receiving inquiries from unidentified individuals and the alarms went off. Because of this, Midnight admits that she would like to have Kazuho transferred to a more secure and isolated facility, but acknowledges that she is in no condition to be moved.

Naruhata Lockdown Arc
Not long after the police station was attacked by a yet-to-be-identified assailant, Midnight calls Soga and informs him that Kazuho's condition has been stabilized, but that they are unsure when she will regain consciousness. Soga replies that they are prepared to give the authorities any intel Knuckleduster has collected for them once it is certain that Kazuho's safety is guaranteed, to which she agrees.

At some point, Midnight informs the Narufest group that Kazuho's condition is neither deteriorating nor improving, but tells them she will give them any updates when they happen. Naomasa, Midnight, and the police approach Soga and his friends in front of the hospital, saying that they will be in charge of security from this day on, to which Soga agrees, although he criticizes them for taking too long to make a decision. Midnight attempts to calm them down as a mediator, but her actions prove to be fruitless as Naomasa loses his cool and orders Soga to call The Crawler who they have an arrest warrant for.

Instead, Soga gives Koichi a warning call for him to escape and runs away himself. Naomasa is about to order a chase, but Midnight stops him from deploying his men to chase after Soga, reminding him that they are here to guard the hospital. She calls the detective a terrible negotiator, to which he annoyingly agrees while giving the heroes permission to chase after Koichi. As night approached, Midnight received a call from Soga, who asked to speak with Naomasa to call off the Heroes because the chase is favoring the real enemy.

Just as Soga feared, Number 6 puts his plan into action to assassinate Kazuho. With his Radio Waves Quirk, he causes a huge blackout in Naruhata, cutting off all communications to prevent anyone from calling outside for help. He then uses creatures called the Anonymous to cause chaos and keep the heroes and Koichi busy, while he and other Anonymous goes to the hospital.

Midnight heads to Kazuho's room to guard her and make sure she's alright. Shortly after, Number 6 and his creatures start storming the police-guarded hospital, without anyone being able to stop him. While Midnight and several doctors watch over Kazuho’s body, Naomasa and a few policemen are the last defense to Kazuho's room. The villain taunts them, but falls into their trap and, with the help of Soga and Koichi, Naomasa manages to capture him.

Once Number 6 is restrained, Naomasa gets his men to call Midnight as she heads over there. Number 6 states to himself that since Midnight’s Quirk will put his brain to sleep, he has to shut this down now. Number 6 alters his body to free himself from the handcuffs, but is forced to escape mainly due to Koichi. Once outside, he sends some Anonymous in a suicide mission to take care of the officers and his allies, before making his way back in and kill everyone.

Midnight and the police officers prepare to confront the Anonymous, but are surprised when the creatures suddenly stop in their tracks, unaware that this is because Koichi ran off to confront Number 6, causing him to focus all his attention on him. Wasting no time understanding why, they tie up the Anonymous, and Midnight uses her Quirk to put them to sleep. Naomasa thanks her and orders her to return to Kazuho's room and defend it while waiting for backup.

As Koichi fights Number 6 outside, Midnight makes sure that Kazuho is not in any danger. She momentarily sees through the window and notices the dog fight between Koichi and Number 6, now transformed into a flaming humanoid. Kazuho suddenly starts to suffer from a seizure in her hospital bed, while Midnight worryingly looks on, thinking about how much Koichi is doing right now for her sake, so she can't give in.

Finally, several heroes arrive at Naruhata to help, with All Might and Endeavor definitively defeating Number 6. While this is happening, Midnight performs a cardiopulmonary resuscitation on Kazuho, managing to stabilize her and save her life. Just then, Kazuho finally wakes up and Midnight advises her to rest until Koichi returns.

U.S.J. Arc
Led by Tomura Shigaraki and Kurogiri, the League of Villains attack the Unforeseen Simulation Joint with the goal of killing All Might, only to not find him and decide to attack the students of Class 1-A instead. Fortunately, Tenya Ida manages to escape and runs to the main building to ask for help.

A few minutes later, several members of the school staff arrive at the U.S.J., rescuing the students and defeating the villains, though Tomura and Kurogiri manage to escape. Midnight is among the U.A. faculty members that Tenya brings with him to stop the League of Villains' assault.

U.A. Sports Festival Arc
After the attack on the U.S.J., U.A. High is closed for a day. Midnight and several memebers of the U.A. faculty meet with Police Detective Naomasa Tsukauchi. The detective informs them he was unable to find anything about Tomura or his partner Kurogiri. When All Might notes that Tomura displayed a child-like mindset, Midnight suggests that he probably never received the Quirk counselling every child gets in elementary school. Despite this incident, it is decided to hold the U.A. Sports Festival.

Prior to the start of the Sports Festival, Midnight introduces herself as the chief referee. She warns everyone to play fair while all the students question if her revealing attire is appropriate for a high school event. She demands all of them be silent before she summons Katsuki Bakugo to the podium to lead the pledge. After he finishes, Midnight explains that the preliminary event will be an Obstacle Race around the stadium.

Following the Obstacle Race, Midnight reveals the results and how it translates to the next event: the Cavalry Battle. Midnight explains the rules of the Cavalry battle and its point system, revealing that Izuku Midoriya will be worth the most points since he came in first. While explaining the rules, she is interrupted by Mina Ashido and Ochaco Uraraka. This angers Midnight, prompting her to yell at the girls to allow her to finish explaining the rules. She warns the teams not to knock each other over and allows them to choose their teammates.

When the time for the event comes, Midnight leads the countdown. She allows Minoru Mineta and Tsuyu Asui to hide on Mezo Shoji's back, and when Katsuki uses his explosions to fly away from his team, Midnight allows it because he never touches the ground. Midnight announces when the Cavalry Battle ends and allows Present Mic to announce the placements.

After the lunch break, Midnight announces that those who qualified for the finals will draw lots to determine the pairings for a one on one fighting tournament. She also informs everyone who did not make it may participate in recreational events prior to the finals. She is interrupted when Mashirao Ojiro asks to resign from the finals because he felt he did not play a big enough role in the second round.

Nirengeki Shoda feels the same way, causing Midnight to get "turned on" by their naivety. She allows them to resign and says that two members from Team Kendo must fill in their spots. Team Kendo agrees they did not do much in the Cavalry Battle either and allows Tetsutetsu Tetsutetsu and Ibara Shiozaki to take the two open slots.

Midnight oversees each of the matches during the fighting tournament. She is half frozen when Shoto Todoroki creates a giant ice ridge to freeze Hanta Sero. Even so, she does her job and asks if Hanta can move, to which he replies obviously cannot. When Eijiro Kirishima and Tetsutetsu fight to a draw, Midnight announces that their match will be settled via arm wrestling once they recover. Midnight is forced to stop the match between Katsuki and Ochaco when Ochaco's body reaches its limit and she falls unconscious.

During the match between Izuku and Shoto, Cementoss contacts Midnight and asks her if they should stop the match because of Izuku's injuries. During the climax of their bout, Midnight tries to use her Quirk to knock them out, but is knocked off her stand by the explosion at the match's end. Once the smoke settles, Midnight sees Izuku has been knocked out of bounds and announces Shoto as the winner.

When the final match between Katsuki and Shoto concludes, Katsuki angrily confronts Shoto although he has been incapacitated and knocked out of bounds. In order to stop Katsuki's rage, Midnight uses her Quirk to knock him out and restrain him. Midnight introduces All Might to close out the Sports Festival but ends up interrupting his entrance by accident, though she apologizes for it.

Vs. Hero Killer Arc
Following the U.A. Sports Festival, Class 1-A is among those selected by Pro Heroes to be drafted for internships. Shota requests Midnight come to their homeroom class to help them choose hero names. She has everyone come up with their own names and present them in front of the class, approving or disproving them as they go one by one.

She advises Yuga to shorten his name "I can't stop twinkling" to just "Can't stop twinkling". She discourages Mina from using "Alien Queen", having to opt for "Pinky". She finds it interesting that Eijiro chose "Red Riot" as his hero name in homage to Crimson Riot, and so on. She feels disconcerted that both Shoto and Tenya elect to use their real names, and disapproves of all the names chosen by Katsuki as she considers them all too violent.

Final Exams Arc
Midnight is featured on a daytime talk show where she talks about the necessity of her need to dress sexily while doing hero work. She explains that she uses a thin costume because, like many others, her Quirk requires exposed skin to work. While talking, she is repeatedly interrupted by Mt. Lady, who is also being interviewed. Eventually, the two come to blows over their ages, much to Minoru's viewing pleasure.

Later on, Midnight meets with her fellow faculty members prior to Class 1-A's final exams. They discuss changing the format of the finals from facing robotic villains to fighting against the teachers. Midnight comments that this may be too difficult for the students, but they all ultimately agree on the change. Cementoss joins the other teachers at the Final Exams practical portion test site to meet Class 1-A. Midnight is placed against Minoru and Hanta in the ninth match.

At the start of their bout, Midnight uses her Quirk to put Hanta to sleep, and sits at the escape gate with a sleeping Hanta on her lap, much to Minoru's jealousy. Midnight decides to pursue her fleeing student because her sadistic side is aching and whips him as he runs away from her. She criticizes him for running away, but Minoru reveals that his cowardice was just a ploy to fan Midnight's sadistic side and lead her away from the escape gate.

Minoru reveals as a fan of hers, he knows her quirk and has a plan. He comes out of hiding with Hanta's tape wrapped around his mouth to avoid breathing in Midnight's fragrance. She claims he cannot fight her while suffocating, but he uses his Grape Rush technique to stick his spheres to her whip and immobilize her. Minoru runs past her and Midnight admits that Minoru was very impressive. Minoru grabs Hanta and drags him outside the gate to pass the exam.

Forest Training Camp Arc
To prepare for the Provisional Hero License Exams, the students of Classes 1-A and 1-B are taken to a Training Camp to train and power up their Quirks. Even though the school staff had kept the training place a secret from outsiders, the Vanguard Action Squad of the League of Villains locate and attack the place, leaving several students injured and kidnapping Katsuki.

The next day, the school itself faces scrutiny by the media and families for this incident. Nezu, Midnight, Present Mic, Snipe, and All Might meet to discuss the attack. Midnight expresses her uneasiness that they have lowered their guard due to the low crime rates in the country, and how the League of Villains had taken advantage of it. She is also shown to be concerned when Present Mic considers the possibility of a traitor in the school.

Provisional Hero License Exam Arc
After Katsuki's rescue and All Might's retirement as a hero after defeating All For One, the students return to their school life. In Class 1-A's room, Shota mentions that their first objective will be earning their Provisional Hero Licenses, and due to the difficulty of the exam, the students will create Ultimate Moves that they will use in combat.

For this task, Midnight, Ectoplasm, and Cementoss join Shota in his homeroom class, and elaborate more on the importance of ultimate moves. Midnight explains that the Ultimate Moves will be their symbols, and that there are fewer and fewer Pro Heroes without them.

They move to Gym Gamma where the teachers announce that the students will need special moves for the upcoming Provisional Hero License Exam. Midnight uses Kamui Woods' Lacquered Chain Prison as an example of a Ultimate Move. Four days later, Fumikage Tokoyami develops his own Ultimate Move, which Midnight advises him to change the name because Ultimate Moves should be easy to say.

Shie Hassaikai Arc
Midnight is in the staff room when she listens in on a conversation between Izuku and All Might. Izuku wants to participate in the Hero Work-Studies under Sir Nighteye's guidance, but All Might refuses, and explains that one of the reasons is because he opposes the idea of freshmen taking part in work studies. Overhearing this, Midnight comments that the school should support students who want to go.

A few days later, Izuku returns to the staff room to talk to All Might again, but is informed by Midnight that he is out jogging, which confuses him. She explains to Izuku that shortly after his retirement, he started working out and training himself.

U.A. School Festival Arc
While Izuku and Mirio are giving Eri a tour of the school as everyone prepares for U.A. School Festival, they meet Midnight and Principal Nezu in the Lunch Rush Cafeteria. Midnight tells them that Nezu had a hard time convincing the Police Force's Commissioner-General to allow them to celebrate the festival, in exchange for a series of conditions, the most important being to immediately cancel the event if the alarms sound, even if it is a false alarm. Nemuri leaves after wishing Izuku his best at Class 1-A performance.

On the morning of the day of the festival, Midnight greets All Might before noticing Izuku's permission slip to leave the grounds. All Might explains Izuku received permission to leave school grounds to buy last-minute supplies. Midnight expresses her concern that Izuku might not make it in time for Class 1A's performance for the School Festival.

Fortunately, the festival runs smoothly and Midnight enjoys it.

Joint Training Arc
The last month of the year begins, and Shota Aizawa and Sekijiro Kan decide to organize a Joint Training Battle between their respective classes. When the first round is about to start, Mina sees All Might and Midnight arrive to watch the training and automatically wonders if they're lovers, to which Midnight replies that she doesn't mess with older men.

With 20 minutes on the clock, the battle between Classes 1-A and 1-B begins. Midnight asks All Might who he thinks will win, and All Might reveals that although 1-A has been getting more tangible, real-world experience, 1-B has actually improved more, due to them staying out of trouble and steadily improving their skills.

When the first round ends with victory for Class 1-A, Midnight reacts giddily to the participants' antics, to the point All Might tells her she has issues. While the students go over their plans for the rest of the exercise, their enthusiasm proves too much for Midnight to bear.

After the second round, it ends with victory for the Class 1-B team. Despite everything, Midnight does not hesitate to recognize the growth and improvement of Momo despite the defeat of her team.

The third round ends in a tie and the fourth begins. Despite the fact that both classes have the same points, Vlad King does not hesitate to praise Class 1-B while treating Class 1-A very unfavorably in his comments, leading to protests among the students in this class. Over in the distance, Midnight comments that it is ironic that Vlad King's Quirk is blood control, yet he cannot control his own hot-blooded head to which All Might adds that his passion is overflowing.

All Might tells Midnight that Class 1-B has powered up as a result of their daily training, but that Class 1-A is not going to sit around forever. Midnight says that All Might really loves Class 1-A to which he replies that he loves all the students.

The fifth round ends with Class 1-A victorious, and Midnight announces that the Joint Training Battle has now concluded, congratulating all participants for trying their best to win the battle. During the round, Izuku's Quirk became uncontrollable and manifested a new power, but thanks to the intervention of Ochaco and Hitoshi, Izuku was able to control it, preventing anything bad from happening.

During post-combat reflections, Izuku thanks both of them, and Midnight continues the feedback by commending Hitoshi and Ochaco's heroism, mentioning how it "turns her on" in terms of excitement and passion, especially praising Ochaco for putting herself on the line to help Izuku. The next day, Midnight and the rest of the U.A. High teachers are shown discussing Hitoshi Shinso's graduation to the Hero Department. They decide that it will definitely be happening.

Endeavor Agency Arc
Class 1-A participate in a Hero Interview Training taught by Mt. Lady. Midnight accompanies her and helps set the stage for the training. One by one, the students participate in a mock interview, until it is Katsuki's turn, who ends up flopping his interview with his explosive behavior. Midnight and Shota agree that Katsuki is better off following his path instead of interacting with the media.

The last interview goes to Izuku, who initially appears slightly nervous until he excitedly goes on to talk about his Quirk. Midnight questions about his newly developed ability. Izuku decides to demonstrate his newfound power, unleashing a small wisp of his Blackwhip ability, which didn't seem to amuse neither Midnight nor Mt. Lady.

A few days before Christmas Eve, several U.A. teachers are in the Conference Room, discussing that the Hero Public Safety Commission demand to all hero schools that their students must undergo practical field training, carrying out Hero Work-Studies. Midnight deduces from this request that, although there are more heroes than ever, they are understaffed.

For everyone, it is clear that, after the disaster that occurred in the Deika City, in which it is suspected that the League of Villains was involved, the Commission surmises some kind of huge imminent crisis, and wants all heroes to be ready for what can happen.

Paranormal Liberation War Arc
The months go by until it's late March. Thanks to Hawks, the Hero Public Safety Commission has found out that the League of Villains and the Meta Liberation Army merged into the Paranormal Liberation Front, with Tomura Shigaraki as the main leader. Hawks also informed them about the organization, the hideouts, and the plans of the PLF. With this information, the Commission organized a large force of Pro Heroes, divided into several teams to take down the villain organization.

Midnight is assigned as a member of a large group of Pro Heroes whose mission is to storm Gunga Mountain Villa, the main headquarters of the Paranormal Liberation Front, and arrest all its members. Alongside the heroes are some U.A. students like Fumikage Tokoyami, Denki Kaminari, Juzo Honenuki, and Kinoko Komori Kinoko is nervous and worried at the thought of attacking the Paranormal Liberation Front, asking if they really should be there. Midnight explains that the students will just be helping a little during the initial assault, after which they can retreat.

The heroes launch their attack on the Gunga Mountain Villa. Denki yells that he doesn't want to be on the front lines, and Midnight tells him he knew what he was getting into. She also adds that they need his Quirk, and to think of this position as helping out the Heroes who don't have what it takes. Denki strongly disagrees with this statement, but Midnight comforts him by saying that if he can't focus on random people elsewhere, he can think of the person who matters the most to him. Her words help Denki to finally gain enough determination to fight.

The soldiers of the Paranormal Liberation Front quickly go out to face the heroes, but because they are caught off guard by the surprise attack, the heroes take the initiative in the first confrontations, defeating many of the soldiers before they can fight back. While dodging the foes, Midnight uses her Somnambulist Quirk to put PLF members to sleep, employing a pair of fans to spread her sleep-inducing aroma in the enemy lines.

Later, when Gigantomachia awakened, Kamui Woods is carrying Midnight on his back while swinging across the trees to get to Gigantomachia's face. Despite Kamui Woods' concerns, Midnight convinces him to keep moving. She says that if Gigantomachia makes it into the city, he will destroy it, and if they can't stop the behemoth by force, they will put him to sleep, which is what Midnight plans to do with her Quirk.

Kamui Woods is then dowsed in a stream of blue fire courtesy of Dabi. As Midnight notes the group, she ends up slamming into several pieces of building debris released by Mr. Compress, causing her to fall to the ground as Gigantomachia makes his way. Midnight tries thinking of various people who could put the giant to sleep before contacting Creati. After confirming she knows the situation, Midnight tells her that she needs to put Gigantomachia asleep with an anesthetic, even if it is against the law.

Before Creati can ask what is going on, Midnight is ambushed by one of the number two advisers from Dabi's regiment, but not before telling Creati that if it is too difficult, they can hand the anesthetic to the Heroes and evacuate. As she turns to face her attackers, she thinks back to Creati's performance during the Joint Training Battle, and knowing that she will make a fine leader, she will trust her judgment. Unfortunately, her resistance isn't enough and she is killed in battle.

Once the war concluded, her body is found in the forest by some Class 1-A students. Mina, Eijiro, Momo, and Rikido mourn over the death of Midnight. She is later counted amongst the list of casualties.