Toshinori Yagi

Toshinori also known by his Hero name All Might (オールマイト, Ōrumaito) is the No. 1 Hero and the "Symbol of Peace". He also teaches foundational hero studies at Yuuei.

Appearance
In his hero form, All Might is a very tall and over-musculated man whose design resembles the American hero comics. His hair spikes on top of his head and his whole body has more shadows than any other character in the series regardless of the time of day, furthering his stylized appearance. His hero costume consists of a red, white and blue body suit with golden gloves and boots. It has been shown with, and without a cape. Overall, its design is considered very classical.

In his true form, he is an overly-skinny man with angular features, long limbs and neck. He has spiky, disheveled hair with two bangs framing the sides of his face, and loses his eyebrows from his hero form. He possesses a large scar that covers most of the left side of his chest, and it is not uncommon for him to constantly spout blood from his mouth when excited or surprised. He typically wears baggy clothing to accommodate his quirk's size change.

Note that in both forms, his eyes are sunken in, but the difference is that you can see his eyes in his true form.

Personality
All-Might's hero persona derives much from American hero stereotypes, in which that they're colorful and have a lot of dramatic flair. Always sporting a giant smile, he usually shows off a bright, can-do attitude that borders on being obnoxious. All-Might also tends to be extremely friendly and amicable, due to his popularity and years in the spotlight. However, when All-Might reverts back to being sick and scrawny (as a result of a previous battle), he tends to be less energetic due to his constant blood-spitting. Additionally, tries not to draw much attention to himself while in his true form, always afraid that others might learn of his current state of health.

Two personality traits always persist, though, whether he's in hero-mode or normal-mode: his optimism and his oafish-ness. All-Might has always had faith and hope that someone would come along, worthy enough to bear the "One for All" quirk. He is also depicted sometimes being outsmarted by his students, and even his fellow teacher, Shouta Aizawa has called him an idiot a few times.

While he is seen smiling, laughing and cheerful most of the time he was shown to be really angry when he learned that the villains were trying to get to him through his students that even Izuku was surprised to see him not smiling or laughing and with an angry face. He was willing to use his Quirk beyond his time limit in order to save his students.

He possesses a fatherly attitude towards his students, in particular Izuku, which he often hides and keeps to his thoughts. He is quick to give encouraging advice to them when the situation calls for it. He is proud in their accomplishments.

Past
Before he met his teacher, who had passed on One For All to him, All Might originally did not have a Quirk. Ten years ago, All Might had a chat with Endeavor. Also five years before his meeting with Izuku Midoriya, All Might fought a very powerful villain, which resulted in critical injuries that limited the time he can use his Quirk to three hours a day.

Entrance Exam Arc
All Might first appears when Izuku Midoriya is being attacked by a villain. He then uses Texas Smash on the villain, saving Izuku. All Might is glad to see that Izuku is all right. He then decides to leave, asking Izuku to continue to support him. However, he is forced to land after Izuku grabs on to his leg. After doing so, he tries to leave again, but Izuku questions him on whether he can become a hero without a Quirk. All Might reverts back to his true form, shocking Izuku. He then tells Izuku is professionals must always put their lives at stake to save the day and thus cannot openly say whether it is possible to be a hero without a Quirk as it may not be possible. All Might says that if Izuku cares about saving people, he can always go on to become a policeman, as in that way he can be responsible for putting the villains in jail (even though it is ridiculed).He tells Izuku that it isn't bad to dream, but warns him not to obscure the facts and then leaves. All Might then sees that he wasted time in talking with Izuku, causing the villain he defeated before to escape, saying to himself that he is pathetic. After seeing Izuku's bravery in trying to save Katsuki from the villain, All Might decides to step in and uses Detroit Smash to defeat the villain, saving both Izuku and Katsuki. All Might then appears before Izuku, saying to him that he thanks him and has a proposal for him. He tells Izuku that he was touched by Izuku's bravery for trying to save someone despite not having a Quirk and tells him that he too can become a Hero. All Might tells Izuku that he is worthy to inherit his strength. He tells him that his Quirk can be passed down and that Izuku has been chosen by him to be the next one to inherit his Quirk. Izuku asks why he would give someone like him his Quirk, to which All Might responds that he has been searching for a successor for a long time and now has found someone that he doesn't mind giving his Quirk to, saying that he despite not having a Quirk, tried to save somebody and that he shined more than any of the other heroes. Thus, All Might's proposal is whether he wants to inherit the One For All Quirk from him or not. Izuku accepts All Might's proposal. All Might begins to train Izuku for the next 10 months, explaining to him that in order for him to inherit his Quirk, Izuku's body (vessel) must be strengthened to the point of being able to handle the Quirk's power. All Might trains Izuku at the Seaside Park, a place filled with trash and tells him that he will clean up all the trash as part of training his body to become stronger. After 10 months have passed, All Might tells Izuku that he is now a genuine vessel. He then decides to give Izuku his reward for working so hard for the past 10 months: the One For All Quirk, saying that he has earned it fair and square. All Might gives Izuku his reward (a piece of his hair) and tells him to eat it so that he can inherit his Quirk.

One week later, Izuku receives a letter that will determine whether he was accepted into Yuuei or not. Izuku opens the letter in his room and a screen with All Might on it appears. He apologies for not contacting Izuku earlier and informs him that he will be working as a teacher at Yuuei. All Might tells him that he did fine on the written test, but since he scored zero points during the practical test he has failed. However, All Might tells him that because he rescued someone during the practical test, he earned 60 points, meaning he has passed and therefore being accepted into Yuuei, much to Izuku's joy and happiness.

Quirk Apprehension Test Arc
All Might is seen secretly inspecting Izuku's participation in the pitch trial of the Quirk Apprehension Test, impressed with Izuku's focus of the One For All Quirk at the tip of his finger and for his quick thinking of using the One For All Quirk in the shortest time possible at the last moment as a workaround for not being adjusted to the Quirk. All Might approaches him, calling him a liar and says that he once expelled an entire new class of first-graders last year. All Might knows that he kicks students out with zero chances, finding it weird that he didn't expel Izuku on the spot and concludes to him that even he felt Izuku's raw potential. However, Shouta replies that Izuku's are above the "zero" mark and that it all. He continues to say that he can kick anyone out whose chances drop below that mark at any time, then leaves. All Might then says that they will never get along. All Might then appears as the teacher of the foundational hero studies, saying that they will have a battle of trial for the period. He tells his students that Yuuei have prepared their Hero Costumes and says to them to get changed into their costumes for the battle trial.

Battle Trial Arc
All Might explains to his students that they will be separated into Heroes and Villains for the battle trial and it will be a two on two team battle. He explains that in the battle trial, the villains will guard a nuclear weapon they intend on deploying and the heroes must stop them. He goes on to further say that the heroes can win by capturing the villains or reach the nuclear bomb before time runs out and the villains can win by capturing the heroes or keeping the core away from the heroes before time runs out. All Might then decides that the teammates and pairs will be chosen by lottery. After the lottery, All Might draws from the boxes and says that the pairs that will do battle is the heroes: Izuku and Ochako versus the villains: Katsuki and Tenya. He explains that the villains will go in the building first, then after five minutes, the heroes will go in. He tells them to go all out as it is a practical exercise, although he says that he will stop the battle trial if things get out of hand. All Might is seen in the surveillance room, saying to himself that Izuku won't get any special treatment from him and will grade him as harshly as the rest. All Might tells Katsuki to stop after seeing what his Hero Costume can do to amplify his Quirk and becomes worried for Izuku after Katsuki initiates a huge explosion.

All Might then tells Katsuki that if he uses another huge explosion, he will end the battle trial and he will lose, reprimanding him for trying to destroy the building that protects their stronghold (the core) calling it foolish. Although he feels that he should stop the battle trial, he thinks that it would be better for Izuku and Katsuki to continue battling as it is necessary for the future that they envision themselves. After being asked to stop the battle trial, All Might is about to suspend it, but after hearing Izuku call out to Ochako, he stops. After Ochako touches the core, All Might announces that the Hero team wins.

All Might approaches Katsuki, telling him that its time for his critique. He tells Katsuki that it doesn't matter whether he won or lost, but that he takes one look back, reflect on his experience and move on with life. In the monitor room, All Might says that Tenya was the best during the battle trial. After being asked why, he questions his students as to why he chose Tenya. After Momo Yaoyorozu gives her answer, he gives a thumbs up to her for being absolutely correct. During the next battle trial, All Might is impressed by Shouto Todoroki for not getting him comrade caught in the attack and at the same weakened his opponents' positions as well as refrained from damaging the core. After everyone participates in the battle trial, he tells everyone that they did well and instructs them to change clothes and head back to class. Although he wanted to give Katsuki counseling for his self-confidence, he realizes that his transformation is running out of time and head to the nurse's office.

He is reprimanded by Kango Kyouyu for indulging his disciple, Izuku, too much and he says that he has nothing in his defence. They talk quietly, with him saying that his Quirk is secretly known by a selected few (including her). Kango asks if it is important to be a "Natural Born Hero" or "The Symbol of Peace" to which he replies that without such a symbol, the society of superhumans would fall to evil. Kango then tells All Might to be a better guide to Izuku. All Might then appears before Katsuki, trying to counsel him on self-confidence, although he is told in response by Katsuki that he will surpass him as well, thus All Might decides to leave Katsuki alone, finding that teaching can be difficult.

Ultimate Space & Jams Arc
All Might is seen using Missouri Smash on Vihara Headgear, defeating him and saving the family in the process. He then realizes that his Quirk is steadily dropping off, as the amount of time he can keep his Quirk activated has decreased. In a flashback, Izuku is seen speaking to All Might telling him that he revealed to Katsuki about the secret of the One For All Quirk. However, All Might isn't angry about it since Katsuki interpreted it as nonsense and tells Izuku to keep the secret to himself and no one else since if the villains knew about his secret, all of them would probably want to steal his Quirk. He then tells No. 13 that he won't be able to appear at the Ultimate Space and Jams due to him using his Quirk too much and then takes a nap. After his nap, All Might tries to contact, No. 13 and Shouta, but to no avail. He decides to go to the U.S.J, but Mr. Principal arrives to have a discussion with him, being held up by Mr. Principal's endless talking, seeing that he hasn't changed either. All Might then appears at the U.S.J, telling everyone to have no fear as he is there.

He says that he ran into Tenya and knows the gist about the situation. All Might quickly dispatches the villains in front of Shouta, apologises to him and picks him up. He then rescues Izuku, Minoru and Tsuyu. All Might asks the three to head to the entrance and leaves Shouta with them. When Izuku tries to dissuade him into fighting, Al Might tells him its all right. All Might uses Carolina Smash on Noumu, but has little effect. He realises that his blows are not having any effect against the villain. After hearing Shigaraki's information on Noumu, All Might uses a backdrop slam against Noumu, causing an explosion. However, Black Mist opens a gate with his Quirk, causing All Might's attack to fail and allows Noumu to grab All Might. However, the combined efforts of Katsuki and Shouto allow him to escape from Noumu.



All Might then blocks a punch from the regenerated Noumu, giving Katsuki some time to evade. All Might then calls Shigaraki's view on the title Symbol of Peace as rubbish. He then tells the children to escape, thanking Izuku for his concern and says that he is fine. Realising that he has only a little time left, All Might decides to go all out. He and Noumu get into a fist fight and All Might sees that he can absorb each punch at 100%. All Might decides to surpass his 100% and launches a devastating punch against Noumu, sending Noumu flying out of the U.S.J, defeating him. Even though he is badly beaten and battered, All Might prepares to fight Shigaraki.

All Might asks why he is not going to fight since it is his mission to kill him. All Might then realises that his fight with Noumu has completely left him powerless, not even having the strength to take another step. Shigaraki and Black Mist attack All Might, but Izuku intervenes to protect the powerless All Might. However, one of the heroes that Tenya called as backup stops Black Mist and Shigaraki from attacking him. When Izuku says he couldn't do anything, All Might says its not true, telling him that if it were not for his few seconds of bravery, he would be dead and thanks him for saving him.

All Might is then seen at Yuuei's Nursery, being treated by Kango. A detective arrives who All Might knows and asks him about the students' conditions, as well as Shouta and No. 13. The detective tells him that the students are unharmed, but Shouta and No. 13 are injured, but not in danger of death, relieving All Might worries. All Might tells the detective that the students fought bravely and that they will become great heroes, to which the detective agrees.

Sports Festival Arc
All Might is seen in the meeting room, commenting on Tomura's arrogance and when he started to panic when things went wrong. After taking Tomura's childish personality into consideration as well as his determination, All Might concludes to those in the meeting room that Tomura is a mere character who believes that he is the center of attention, an "adult-child". After the meeting, All Might finds Izuku and asks him to have lunch with him. In the resting room, All Might asks him how he is handling his Quirk and Izuku replies that he has gained adjustment to the Quirk, saying that he did not break his arm when punching Noumu, which pleases All Might.

He then tells Izuku that his time as the Symbol of Peace is heading to an end, much to Izuku's sadness. All Might says that Yuuei's Sports Festival is an event the whole country will be watching and tells Izuku that in the event he wants the whole world to know that he is the new generation's "All Might" and the future Symbol of Peace, shocking Izuku.All Might states that he wants Izuku to demonstrate his full potential to everyone at the Sports Festival. After Izuku doubts himself, All Might encourages him, stating that the difference between someone who aspires to the top and someone who doesn't will have a huge influence when he steps up and steps forward in society. All Might says that he understands Izuku's feelings towards his condition and won't force him to do anything, but asks him to remember his feelings during the time he cleaned up the Seaside Park.

At the Sports Festival, after Izuku places first in the Obstacle Race, All Might smiles and claps for him. All Might then ponders about Katsuki, thinking that his ranking in the Obstacle Race, combined with the sheer versatility of his Quirk makes him a popular choice for a teammate. Near the end of the Human Cavalry Battle, after seeing Katsuki using strategy to get Neito's last headband, All Might comments to himself that Katsuki, despite no one telling him, is grasping instinctively the difference between those who don't necessarily aim for the top all of the time and those who always do. After the lunch break begins, All Might in his hero form greets Endeavor, saying its been a while and asks him to have tea with him.

All Might says that they have not spoken to each other in ten years and that he wanted to give him a shout out, Endeavor replies that he can take his tea offer to some other place and tells him to go away. As Endeavor leaves, All Might stops him, saying that his son Shouto was able to show a great performance even without using half of his power. All Might then asks Endeavor for advise on how-to raise the next generation. Endeavor then comments on All Might's attitude, finding it to be annoying and then says that he will make Shouto a hero that surpasses All Might, then angrily walks away. All Might goes to see Izuku before the beginning of his match. After Izuku says that he can raise his strength only a little with One For All, All Might says that originally, on a scale of one to a hundred, the amount of strength Izuku's body could tolerate it was zero, but now its a five. When Izuku starts frowning, All Might cheers him up; telling him to do his best and encourages him to smile when he is full of fear and anxiety. All Might then concludes that he is always watching Izuku. All Might goes to the infirmary to see Izuku, After Kango scolds All Might for putting pressure onto Izuku, Izuku tells All Might about the mysterious shadows he saw, saying that the shadows helped him break free of Hitoshi's mind control and asks All Might if what he saw were the people who wove the power of One For All. All Might replies that he too saw something similar to what Izuku saw in his younger days. All Might theorizes that the people he saw were imprints of those who have used One For All but not the sort who have a will on their own and concludes that Izuku broke Hitoshi's spell not because of the predecessors of One For All but because his unwilling of willpower caused the vision to appear that broke Hitoshi's brainwash. Izuku isn't completely satisfied with the explanation, but All Might tells Izuku not to dwell on it and tells him to go watch the next match. After Izuku leaves, Kango says that Izuku also saw him in the vision, to which All Might replies that it is a good thing. During the match between Izuku and Shouto, All Might watches on, worried for his student's health. After Izuku states to Shouto that becoming Number One without his full strength as well as to disown someone is a joke, All Might remembers Endeavor's words of making his son surpass him. Soon after remembering, All Might theorizes to himself that Shouto won't use his fire power due to the discord between him and his father. He then tries to figure what Izuku is trying to do. After Shouto activates his fire power, All Might concludes that Izuku is trying to save Shouto from his cruel fate, despite wanting to win. All Might notes that Izuku is going out of his way to help is opponent, causing him to wonder which of them is the joke. After Izuku is defeated by Shouto, All Might goes to Kango's office to see Izuku. Kango scolds All Might for making Izuku push his limits and tells All Might not to try and praise Izuku for going so far. When Izuku apologizes to All Might for not living up to his expectations, All Might's face is filled with regret. After Izuku tells All Might that all he wanted to do was help Shouto and asking for forgiveness, All Might responds by saying that his match was simply an unfortunate outcome but praises Izuku for helping Shouto with his problem, saying that reaching out and helping people with their personal problems is one of the principal qualities of a Hero, happy that Izuku has such a quality. After Izuku's surgery is finished, Kango tells All Might to try and find a different method for Izuku to use his One For All. Izuku leaves Kango's room with All Might and they walk down the corridor. Izuku sadly tells All Might that he thinks someone else should be his successor. However, All Might tells Izuku that he used to be Quirkless just like him, which surprises Izuku. Izuku says to All Might that he never knew about that information causing All Might to reply that Izuku never asked him. All Might tells Izuku that he chose him to be his successor at first due to him being similar to his former self and admits to Izuku that he has surpassed his expectations after seeing Izuku's actions. He then says to Izuku that only he will be able to truly shine with the power of One For All. Having been cheered up by his mentor, Izuku apologizes to All Might. All Might tells him to watch the rest of the Sports Festival, to which he complies.

All Might, in his Hero form, appears at the closing ceremony of Yuuei's Sports Festival to hand out medals to the winners of the Freshmen Stage: Fumikage Tokoyami, Shouto Todoroki and Katsuki Bakugou. All Might gives Fumikage his medal for placing third, congratulating and acknowledging his strength. He gives Fumikage a pat on the back and a congratulatory hug, telling Fumikage that in order to defeat his problem with unfavorable matchups he shouldn't always rely on his Quirk and that he should increase his own strength to deal with unfavorable matchups better. All Might gives Shouto his medal for placing second, congratulating him and understands that Shouto had his reasons for suppressing his fire side in the final match. After Shouto tells All Might that he must come to terms with things to solve his problems, All Might gives Shouto a congratulatory hug, saying to Shouto that he won't pry any further and that he knows fully well that Shouto can solve anything with his power. All Might then goes to give Katsuki his medal for first place, finding the restraints to be a little too much. All Might takes Katsuki's face mask off, causing Katsuki to angrily yell that he doesn't deserve to be Number One. However, All Might tells Katsuki that society will acknowledge him as Number One even if he doesn't. All Might gives Katsuki his medal. Afterwards, All Might gives a speech to everyone; saying that everyone who participated in the Sports had a chance to stand on the podium. He goes on to say that the future generation of Heroes looks bright. All Might yells out "Great Work", much to the confusion of the crowd who thought he would yell "Plus Ultra", causing him to reply that he thought "Great Work" would be far more appreciative.

Field Training Arc
All Might is in Yuuei's Faculty room. Cementoss informs All Might that a new nomination has just arrived for the freshmen, telling All Might that the nomination is for Izuku. Excited, All Might goes to check who nominated Izuku. As he checks, All Might becomes flabbergasted at the person who nominated Izuku.

After school that day, All Might appears in front of Izuku as he is about to leave class. All Might and Izuku walk along the corridor. All Might says that Izuku received a nomination, much to Izuku's surprise. All Might tells Izuku that the person who nominated him was Gran Torino. All Might explains that Gran Torino was a Pro Hero who taught at Yuuei for one year and that Gran Torino was his homeroom teacher. All Might says that Gran Torino was a close friend of his predecessor, but now he is in retirement. All Might says that Gran Torino knows about the One For All Quirk which is the reason why he must have nominated Izuku. Shaking nervously, All Might wonders if Gran Torino was compelled to nominate Izuku due to him thinking that his guidance towards Izuku was lacking, becoming terrified by the fact that he is taking up his Hero name again. While trying to stop his legs from shaking, All Might tells Izuku that while it is his duty to train him, he should select Gran Torino as his work place of choice and go see what he can learn from him. Before leaving, All Might informs Izuku that his Hero costume has been repaired.

Naomasa meets with All Might at Yuuei. He tells All Might that the Police Force have tried everything to get information out Noumu, however, everything they tried did not work. Naomasa says that they instead looked into Noumu's background through DNA analysis and have discovered that Noumu was once a human with a criminal record. Naomasa explains that the DNA analysis also revealed that Noumu has the DNA of at least four different humans mixed with his own. Naomasa concludes that Noumu is an artificial human made to measure up to multiple Quirks and that having all the DNA in his body as well as his body modified caused Noumu's brain activity to stop. Naomasa tells All Might the real issue is that Noumu's DNA is of primary concern because it contains multiple Quirks. Naomasa says that Noumu could not have acquired multiple Quirks in any way (unless Noumu acquired the Quirks through advanced genetic familial permeation. Naomasa comes to the conclusion that someone with a Quirk that can grant Quirks is behind Noumu's acquisition of multiple Quirks. All Might becomes concerned.

Powers and Abilities
All Might is an extremely powerful Hero as he is recognized as the "Symbol of Peace", indicating his extraordinary power. He was able to defeat Noumu (who was created to specifically to combat All Might) despite Noumu having Quirks that gave it an advantage over All Might.

Quirk
"One For All" - All Might's Quirk grants him superhuman strength, superhuman speed, greatly enhanced agility, enhanced reflexes, high durability and the ability to fly.

Moves

 * Texas Smash (Move): All Might throws a right punch with enough force that the wind pressure sends anything made of liquid flying away. This move was first used to save Izuku Midoriya from an unknown enemy in Chapter 1.
 * Detroit Smash (Move): All Might preforms that same attack as Texas Smash except this move is with a downward punch instead of a straight punch, the punch is powerful enough to create a shock wave large and powerful enough to cleared the weather. This move was first used to save Izuku Midoriya and Katsuki Bakugou from an unknown enemy in Chapter 1.
 * Missouri Smash (Move): All Might runs towards an enemy while keeping his hand flat and hit the enemy on the head while running past them. This move was first used against Vihara Headgear in Chapter 13.
 * Carolina Smash (Move): All Might runs towards an enemy while keeping his hands in a cross position, then in a downwards cross chop to the enemies head. This move was first when against Noumu in Chapter 18.

Battles
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Entrance Exam Arc

 * Izuku Midoriya and All Might vs. Unknown Enemy: Win

Ultimate Space & Jams Arc
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 * Kamui Wood, Mount Lady & All Might vs. Vihara Headgear: Win
 * All Might vs. Noumu, Black Mist & Shigaraki Tomura: Lose
 * All Might, Izuku Midoriya, Katsuki Bakugou, Shouto Todoroki & Eijirou Kirishima vs. Villain Alliance: Win

Izuku Midoriya
At their first meeting, All Might thought that Izuku was just a fan, but he started to acknowledge him when he jumped to save Katsuki from the Hedoro Villain. From that moment, he was touched by Izuku's bravery (despite not having a Quirk) and decided he would pass his powers to Izuku, feeling that he is the only one worthy enough to inherit his strength, and they started to share a feeling of mutual respect for each other.

Shouta Aizawa
Not much is known of their past, but due to their contrasting personalities, they don't get along very well.

Kango Kyouyu
Kango is one of All Might's friends that know about his condition and his Quirk.

Mr. Principal
Mr. Principal is another of the few people that knows of his condition and was the person that offered him a teacher position at Yuuei.

Naomasa Tsukauchi
Tsukachi is also another person that knows about his condition, and All Might thinks he is the best cop there is.

Endeavor
Ten years before the start of the series, All Might once had a talk with Endeavor and since then, they have not spoken to each other. All Might appears to respect Endeavor, wanting advise from him on how to raise the next generation. It seems that their rivalry is mainly one-sided (on Endeavor's) as All Might is usually friendly with him.

Trivia

 * He likes movies.
 * His signature moves are named after states and cities in America.
 * All Might has a habit of calling those who are younger than him "My boy", in his mind or while talking to them directly.

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