Toshinori Yagi

Lore & Background

Toshinori Yagi, known as All Might, was once a towering figure who ushered in an era of safety and hope for humanity. His body now carries the permanent scars from his battle with All For One, which left his respiratory system permanently damaged and stripped away his ability to maintain his heroic form for long periods. Despite losing the ability to fight, Yagi dedicated his remaining life force to guiding his successor, Izuku Midoriya. He served not just as a teacher at U.A. High School, but as a living example of resilience, acting as a father figure who taught that true heroism stems from the will to save others rather than raw power alone. Even in his weakened state, he maintained a public persona of unwavering optimism, proving that one's spirit can shine brighter than any physical form. In the film, taking place between the Final Exams and the Forest Training Camp story arcs of the manga, Izuku Midoriya / Deku accompanies Toshinori Yagi / All Might in visiting his old friend at I-Island when Villains attack the artificial moving island.

In Their Own Story

On I-Island, during a formal party with all the Heroes present, Wolfram, a terrorist villain who had secretly arrived on the island, takes control of the island's security system and threatens to kill its residents. He restrains all of the attending Heroes, including All Might, and takes David and his assistant, Samuel Abraham, hostage to break into the island's vault. Wolfram then uses the Quirk Amplification Device to amplify his power, creating a giant metal body with David trapped inside. He overpowers All Might and reveals that he'd also been given an additional Quirk by All Might's arch-nemesis, All For One, who wanted to be involved to demoralize All Might. With All Might lacking the strength to defeat Wolfram alone, Izuku comes in to aid him. The rest of the students soon arrive to assist in their fight, as All Might and Izuku combine their One For All's to defeat Wolfram and free David. As the students celebrate their victory, All Might and David reflect on the people, such as Melissa and Izuku, becoming the next generation of Heroes, and how the world will be in safer hands even after All Might's Quirk is gone.

Reader's Guide

Toshinori Yagi represents the culmination of a lineage of heroes who sacrificed their personal lives for the greater good. His journey began as a powerless youth chosen by his predecessor to inherit One For All. This unique Quirk allowed him to stockpile raw power, which he used to become the Symbol of Peace. However, the cost of this peace was immense. His battle with the villain All For One left his respiratory system permanently damaged, stripping away his ability to maintain his heroic form for long periods. This physical toll forced him into retirement, a moment that shook the world and revealed the fragility of relying on a single savior. Yet, Yagi viewed his injury not as an end, but as a necessary step to ensure the future. His greatest achievement was finding and training Izuku Midoriya. He recognized the selfless nature in the young boy and passed the torch, teaching him that heroism is about saving people with a smile. Even after losing his power, Yagi continued to serve as a teacher at U.A., proving that a true hero never truly retires as long as they can inspire others.

Did You Know?

• The film's timeline takes place between the Final Exams and the Forest Training Camp story arcs of the manga.
• All Might's arch-nemesis, All For One, gave Wolfram an additional Quirk to demoralize All Might.
• All Might and Izuku combine their One For All's to defeat Wolfram in the film's climax.
• The film grossed $33.4 million worldwide and won the Crunchyroll Anime Award for Best Film.
• A one-shot spin-off manga focusing on Melissa, titled 'Everyone Is Surely Someone's Hero', was published in Weekly Shōnen Jump on July 30, 2018.