All Might

Biodata

Background / History

Career in the United States

All Might studied in the United States as an exchange student, traveling with a close friend and fighting criminals under his hero identity. His partner, scientist David Shield, designed his battle suits and contributed substantially to his rise as the Symbol of Peace 211 331.

His repeated victories over villains and rescues from large-scale disasters earned him international recognition as “the one and only superhero.” DC Comics published a series based on his American exploits, which became popular worldwide. After his studies, he returned to Japan and helped restore order there; Homelander later occupied the position described as America’s Symbol of Peace 211 317.

The Secret Battle Against All For One

As an inheritor of One For All, All Might continued a generations-long struggle against All For One. Five years before his disclosure to Jilan Jiyu, he led a covert operation that defeated All For One but failed to kill him. The battle left numerous heroes dead or injured, and the government suppressed its records and required participants to maintain secrecy 428.

All Might suffered catastrophic abdominal injuries, losing his entire stomach and half his respiratory organs. Diduo Chengjie’s account connects this battle to Kyoka Makoto’s retirement: nearly half the participating heroes were seriously injured, and several died 164 428.

Choosing a Successor

All Might passed One For All to Izuku Midoriya and undertook his training as the next Symbol of Peace. His remaining Quirk Factor continued to decline afterward, while his old injuries independently weakened his ability to remain active 428.

His reduced public activity and move into teaching attracted little widespread suspicion. Jilan, however, tracked the abrupt reduction in his daily activity from more than five hours to no more than three and noticed the unusual attention he gave Midoriya 318 371.

Appearance

• Hero form: Approximately two meters tall, with an exceptionally muscular physique and a broad, reassuring smile 21 424.
• Hair and eyes: Blond hair with two distinctive upward-pointing locks; blue eyes repeatedly described as burning like flames 329 424.
• Facial shading: His heavily shadowed features make him appear to belong to a different visual style from those around him 21 362.
• Weakened form: Around one and a half meters tall, hunched and extremely thin, resembling a frail elderly man 423 424.
• Injury: A large, gouged-out wound on the right side of his abdomen, surrounded by a dark purple discoloration or substance 428.
• Clothing: Wears both tightly fitted suits and a Superman-like combat costume that emphasizes his muscular build 21.

Personality

All Might deliberately uses his smile to reassure others. He recognizes that public confidence depends partly on the Symbol of Peace remaining visible and unafraid, and believes that this makes smiling more important—not less—when he is under pressure. Although he wants to save everyone, he openly acknowledges that he is only one person and can address only the suffering within his reach 237.

As a teacher, he values self-sacrifice, courage, and learning from experience. He defends entrance-exam candidates who risk themselves to rescue others, encourages Bakugo to reflect rather than dwell on defeat, and praises Jilan’s “Golden Spirit” name for embodying composure, courage, indomitability, and self-sacrifice 12 24 168. His enthusiasm can nevertheless lead to questionable teaching decisions: Aizawa warns that his surprise villain simulation could traumatize students still recovering from a real attack 90.

His reassuring manner conceals anger, guilt, and anxiety. He blames himself for arriving late at USJ and later for relaxing in a bathhouse while his students were attacked at their training camp 44 423. He is also willing to use force against a captive enemy who harmed his friends, though he remains cautious about causing unintended fatal injury 53.

Abilities & Skills

One For All

An inherited Quirk that combines the ability to store power with the ability to transfer that power to another person. Its accumulated strength increased as it passed through successive holders before reaching All Might 428.

• Origin: Formed when All For One forcibly gave his younger brother a power-storing Quirk, which fused with the brother’s previously undiscovered transfer ability 428.
• Inheritance: All Might passed the Quirk to Midoriya while retaining a dwindling Quirk Factor of his own 428.
• Purpose: He views its inheritance as “Passing the Torch,” entrusting the defense of peace to the next generation 428.
• Current limitation: Once his remaining Quirk Factor disappears, his Quirk will disappear as well 428.

Superhuman Strength and Speed

All Might combines overwhelming physical force with rapid movement, enabling both large-scale attacks and rescues 45 230.

• Rescues Aizawa and gathers several endangered students so quickly that he appears to vanish and reappear 45.
• Defeats a villain whom Kamui Woods and Mount Lady could not stop with a single karate chop 33.
• Produces punch-generated wind pressure capable of destroying buildings along an entire path through an exam venue 230.
• Reaches the speed of sound while charging the enhanced red-haired villain on I-Island 362.
• Remains far above an ordinary Pro Hero even when exam weights force him to devote two-thirds of his strength to maintaining balance 230.

Named Techniques

Combat Judgment and Limit-Breaking

All Might identifies weaknesses in enemy abilities and adapts his physical attacks accordingly 45 46.

• Attempts to immobilize the Nomu by throwing it into the ground; Kurogiri counters the maneuver with Warp Gate 45.
• Recognizes that the Nomu’s Shock Absorption has a capacity limit rather than providing complete damage nullification 46.
• Overwhelms its absorption and regeneration with an accelerating barrage, then launches it through the USJ roof 46.
• Describes this effort as exceeding his normal limits—“200 percent” or more—rather than treating the Nomu’s resistance to his full power as insurmountable 46.
• Recognizes the red-haired villain’s possession of multiple Quirks as evidence of a connection to All For One 362.

Injuries and Vulnerabilities

• Restricted activity: Jilan observes that his daily active time has abruptly fallen to no more than three hours 371.
• Chronic physical damage: His missing stomach and damaged respiratory system weaken him independently of One For All’s transfer 428.
• Visible symptoms: Frequently spits or coughs blood after exertion, including after training and the I-Island battle 95 365.
• Need for oxygen: The red-haired villain traps him in a sealed metal-and-concrete enclosure, exploiting the fact that his strength cannot prevent suffocation 362 363.
• Treatment cost: Cloned replacement organs could heal him, but his powerful body would reject them unless he relinquished his Quirk 428.
• Refusal to retire prematurely: He rejects transplantation until Midoriya can stand independently as the next Symbol of Peace 428.

Equipment / Weapons / Items

• “Superman” combat suit — A specialized costume developed by his partner during his American studies; David Shield is credited with making all his battle suits 99 331.
• Training weights — Special weights worn on his hands and feet to handicap him during Midoriya and Bakugo’s practical exam 230.
• Mobile phone — Used to coordinate with Melissa and Jilan during emergencies; Gran Torino criticizes his habit of leaving it audible during meetings 358 427.

Story Role / Major Arcs

U.A. Entrance Examination and Combat Lessons

• Observes the entrance examination and argues that candidates who sacrifice themselves to save others have demonstrated the qualities needed to become heroes 11 12.
• Introduces Class A’s custom combat uniforms and organizes indoor two-on-two exercises, assigning students to hero and villain teams 21 22.
• Allows Midoriya and Bakugo’s dangerous match to continue, but warns that another use of Bakugo’s excessive attack will result in an immediate loss 23.
• Arranges transport for the injured Midoriya, accepts Jilan’s healing assistance, and emphasizes post-match reflection 24.

USJ Attack and Investigation

• Is the League of Villains’ intended assassination target during its assault on Class A 35.
• Reaches USJ after meeting the escaping Iida, rescues injured teachers and students, and confronts the specially prepared Nomu 44 45.
• Receives crucial assistance from Bakugo and Todoroki after Kurogiri and the Nomu trap him, then defeats the Nomu by exceeding its defensive limits 45 46.
• Remains vulnerable after the victory; students intervene again while the villains attempt to finish him off, before the attack ends with Shigaraki and Kurogiri escaping 47 48.
• Assists the police investigation and Jilan’s examination of the captured Nomu. Later questions why Shigaraki voluntarily revealed information that helped him win 53 54 64.

Surprise Exercise and Sports Festival

• Disguises himself as a surviving League attacker to teach Class A that dangerous encounters will recur throughout their careers 90.
• Is captured in a net during the exercise and apologizes when Bakugo protests that he might have seriously injured his disguised teacher 95.
• Protects Amadeus Mask’s identity while assuring Midoriya that the masked participant will not harm the students 95.
• Presents Sports Festival medals, warns Tokoyami against relying excessively on his Quirk, and promises to deliver the absent Jilan’s runner-up medal personally 141.
• Later serves as Midoriya and Bakugo’s practical-exam opponent, demanding that they work together against him 226 230.

I-Island Incident

• Brings Midoriya to I-Island on a private invitation from a friend, emphasizing that their bond goes beyond an ordinary teacher–student relationship 329.
• Is restrained during the terrorist takeover until the students disable the security system, allowing him and the other Pro Heroes to counterattack 358.
• Learns that David’s Quirk Amplification Device was intended to restore his former strength, but that the invention has fallen into enemy hands 356 362.
• Battles the enhanced red-haired villain and is sealed inside a reinforced metal-and-concrete enclosure 362.
• Breaks free once the villain can no longer maintain the enclosure, then defeats him with Detroit Smash 365.
• Confirms to David that Midoriya is his successor and stresses that the younger generation has dependable companions beside them 361.

Training Camp Aftermath and Tokoyami Rescue

• Blames himself for being absent when the students faced the forest training camp attack 423.
• Discloses his injuries, One For All’s history, and his refusal to surrender his remaining power to Jilan, who agrees to become his ally 428.
• Rallies the Pro Heroes for Tokoyami’s rescue and coordinates with Jilan, who follows Midoriya’s group to prevent the students from acting unchecked 427 429.
• Reassures Tokoyami during the raid with a collective variation of his catchphrase: “Because we are here!” 431.

Relationships

• Izuku Midoriya — Student, chosen successor, and inheritor of One For All. All Might intends to remain active until Midoriya can replace him as the Symbol of Peace 329 428.
• Jilan Jiyu — Student and eventual trusted ally. All Might praises his rescue work, supports his hero aspirations, and entrusts him with helping protect Midoriya and the future of peace 52 168 428 429.
• David Shield — Close friend, former American partner, and battle-suit designer. David’s fear of losing the Symbol of Peace motivates his disastrous attempt to recover a Quirk-amplifying invention 331 356.
• Melissa — Calls him “Uncle Might” and contacts him for help when David is taken by the enemy 358.
• Inspector Tsukauchi — Friendly police contact and operational partner. They cooperate on the Nomu investigation and the response to the League of Villains 52 215 427.
• Shota Aizawa — Colleague and friend. All Might rescues him at USJ; they disagree over the risks of staging a surprise attack exercise 45 52 90.
• Katsuki Bakugo — Student and admirer who wants to surpass him. Bakugo helps rescue him at USJ and later faces him alongside Midoriya in an exam 46 95 230.
• Shoto Todoroki — Student who frees him from the Nomu. All Might’s words about ownership of one’s body also help Todoroki reconsider his rejection of his fire 46 133.
• Endeavor — Fellow major defender of Japan who makes surpassing All Might an obligation for his son 5 131.
• All For One — Longstanding enemy who survived their secret battle and continues operating through the League of Villains 428.
• Tomura Shigaraki — Enemy determined to destroy the society and confidence associated with All Might 182 234.
• Stain — Ideological admirer who regards All Might as the only true hero and the only person entitled to kill him 211 215.

Public Image and Legacy

• Unpaid heroism: According to Aizawa, All Might has never accepted payment for his hero work or established an agency 211.
• Inspiration for future heroes: Jilan and Inasa Yoarashi explicitly connect their ambitions to his example; Stain also originally pursued hero training because of his deeds 1 2 192.
• Deterrent to crime: His name reassures civilians and frightens criminals; his influence also sustains the emergence of new Pro Heroes 230 256.
• International following: His American exploits became globally distributed comics, and I-Island personnel eagerly seek news and autographs from him 211 324.
• Mass-rescue record: Stain recalls a shopping-mall fire in which the final count credited All Might with saving nearly a thousand people 218.
• Concealed decline: Even powerful Hero Course students such as Inasa reject the suggestion that he has weakened, despite the serious deterioration known to Jilan 375.

Notable Quotes

“Everything is fine now! Why, you ask... Because I am here!” 43

“Win or lose, you can only make good use of these experiences if you look back and reflect on them properly.” 24

“Until Midoriya grows into a hero who can stand on his own and succeeds me as the ‘Symbol of Peace,’ I would rather burn away what remains of my soul than undergo an organ transplant!” 428