Enji Todoroki, known professionally as the hero Endeavor, witnessed his father perish attempting to rescue a child from a villain during his youth. This tragedy forged his resolve to become a powerful protector. He adopted the name "Endeavor" reflecting his commitment to relentless effort and his mission to reach hero society's pinnacle. Achieving the rank of No. 2 Pro Hero early in his career, Endeavor found surpassing All Might impossible due to the latter's overwhelming power. This led him to pursue a Quirk marriage with Rei Himura, possessing an ice Quirk, aiming to create a child capable of surpassing All Might. Their first three children—Toya, Fuyumi, and Natsuo—were deemed unsuitable successors due to their Quirk combinations. Toya inherited powerful fire but lacked heat resistance, burning himself during training. Despite Endeavor's attempts to halt Toya's training out of concern, Toya persisted. The fourth child, Shoto, inherited both fire and ice Quirks, becoming Endeavor's sole focus. Endeavor subjected Shoto to harsh, isolated training, physically abused Rei when she intervened, and restricted Shoto's interactions with his siblings. This culminated in Rei's mental breakdown, where she scalded Shoto's face with boiling water, leading to her hospitalization. Toya, distraught over his father's rejection, subsequently died in a wildfire at Sekoto Peak after losing control of his Quirk—an event Endeavor witnessed with horror and guilt. After All Might's retirement, Endeavor inherited the No. 1 Hero position but viewed it as unearned. He shifted focus towards becoming a genuine Symbol of Peace, confronting societal instability and his family's estrangement. He began visiting Rei regularly, acknowledged his past abuse, and sought reconciliation with his children, though Natsuo remained resistant. Endeavor's efforts intensified when Toya resurfaced as the villain Dabi, publicly exposing Endeavor's abuse. During their confrontation, Endeavor expressed remorse for his failures and accepted responsibility for Dabi's descent into villainy. He prioritized saving Dabi's life over his own hero status, supported by his family. Following the Final War, Endeavor retired due to severe injuries, dedicating his remaining life to atonement, including regular visits to Dabi in prison. In *World Heroes' Mission*, Endeavor led a global task force against the terrorist group Humarise, which planned to exterminate Quirk users worldwide. As part of this operation, he directed a covert mission in Otheon alongside Izuku Midoriya, Katsuki Bakugo, and Shoto Todoroki. Endeavor spearheaded a high-altitude HALO jump assault on Humarise's headquarters, coordinating with Clair Voyance to locate Trigger Bombs. When initial raids found no bombs, he supported intelligence-gathering while managing the broader hero response. His tactical acumen mobilized heroes across multiple countries, though the film primarily highlighted his operational role. Professionally, Endeavor established one of Japan's largest hero agencies, employing numerous sidekicks like Burnin. His teaching emphasized efficiency and power control, notably mentoring Midoriya, Bakugo, and Shoto in advanced combat mobility techniques. Despite his abrasive demeanor, his record remained exemplary, with high success rates in resolving crises and combating high-level threats. Endeavor's legacy is defined by his transition from a symbol of personal ambition to one of accountability. His later years focused on repairing familial bonds and supporting hero society through mentorship, ultimately accepting that his past actions required lifelong amends.