Enji Todoroki, known as the hero Endeavor, possesses a tall, muscular build, short crimson hair, sharp turquoise eyes, and fiery facial hair that leaves stubble when inactive. Significant scarring marks his history: a jagged scar runs from hairline to chin from battling Hood, severe facial and body burns stem from confronting his son Dabi, and he lost his right arm during the Final War. Post-war injuries initially confined him to a wheelchair, later requiring a cane for mobility. His hero costume, "The Gates of Hell," evolved after he attained the number one hero rank, featuring flame-resistant armor-like bracers with grill handguards, stylized shoulder pads, and a belt bearing the kanji for "Flame." Originally consumed by an obsessive ambition to surpass All Might, Enji equated heroism solely with strength. This drove him to arrange a quirk marriage with Rei Todoroki, aiming to produce a child combining fire and ice abilities. He first rigorously trained his eldest son, Toya, but halted upon realizing Toya's body couldn't endure his own flames. Deeming Toya a "failure," he shifted focus to his youngest son, Shoto, enforcing brutal training that disregarded Shoto's autonomy. He isolated Shoto from siblings, verbally and physically abused Rei when she intervened, and her subsequent mental breakdown led to hospitalization. Despite this, fleeting moments of care appeared, like remembering Rei's favorite flower. Achieving the number one hero rank after All Might's retirement triggered internal conflict, as Enji felt the title was unearned. This spurred self-reflection on his familial failures. He began visiting Rei regularly (defying medical advice) and attempted reconciliations with his children, acknowledging past wrongs to his daughter Fuyumi and accepting his son Natsuo's resentment. He explicitly vowed to Shoto to become "a proper father," respecting boundaries when rejected. Professionally, he adapted to his symbolic role by engaging more with the public, though his brusque demeanor remained. Lifelong insecurity over comparisons to All Might lessened as he sought advice from him on embodying peace. Enji's "Hellflame" quirk generates and manipulates intensely hot fire. Capabilities encompass shaping flames into weapons like spears and arrows, propulsion for flight, wide-area attacks such as "Hell's Curtain," and precision techniques like "Hell Spider," which slices structures apart. His signature "Flashfire Fist" maximizes heat and speed, though prolonged use risks overheating. Notable techniques include "Prominence Burn," a concentrated vaporizing beam, and its enhanced "PLUS ULTRA" variant. Post-training upgrades mitigated his overheating weakness during extended combat. He exhibits extreme durability, fighting through grievous injuries like a pierced lung, and his intense flames can bypass conventional durability. His battle intelligence is exceptional, allowing him to deduce opponent weaknesses mid-fight and mentor younger heroes tactically. Key battles define his career. Against the High-End Nomu Hood, he sustained facial injuries but achieved victory using "PLUS ULTRA Prominence Burn." During the Final War, he confronted All For One alongside Hawks and students. Distracted by All For One's revelation that he concealed Toya's survival, Enji suffered critical wounds but continued fighting after emergency treatment. In a parallel battle against Dabi (revealed as Toya), both inflicted severe burns before Shoto intervened. Post-war, Enji retired from active duty due to injuries, dedicating his life to atonement.