Dabi, born Toya Todoroki, emerged as the firstborn of Enji Todoroki (Endeavor) and Rei Himura—a product of a Quirk marriage engineered to breed a successor capable of eclipsing All Might. Inheriting Endeavor’s Blueflame Quirk without matching heat resistance, Toya’s body suffered catastrophic burns with each use. Defying warnings, he relentlessly trained to win his father’s validation, clinging to the hope of realizing Endeavor’s ambitions. His physical decline and unraveling mental state intensified when Endeavor redirected attention to Shoto, Toya’s younger brother, whose dual ice-fire Quirk embodied the perfection their father sought. At thirteen, Toya’s Quirk mutated into volatile blue flames fueled by emotional turmoil. A desperate plea for Endeavor’s acknowledgment at Sekoto Peak ended in abandonment. Overwhelmed, Toya unleashed an inferno that consumed the mountainside, leaving him a charred corpse in the eyes of his family. Secretly rescued by All For One, he spent three years comatose. Awakening to a world where his family had erased him—Endeavor fixated on Shoto’s training—Toya shed his identity, reborn as Dabi: a specter of vengeance bent on erasing Endeavor’s legacy. Dabi’s disfigured form became a tapestry of mottled scars, sutured by staples over ravaged flesh, his gaunt physique decaying with each Quirk overuse until muscle and bone lay exposed. His wardrobe shifted from shadowy coats to stark white burial attire, reflecting his embrace of annihilation. Coldly sardonic yet ruthlessly strategic, he manipulated heroes’ insecurities and masqueraded adherence to Stain’s philosophy while prioritizing personal vendettas over ideology. As a League of Villains lieutenant, Dabi engineered chaos to dismantle hero society’s facade, climaxing in his public exposé of Endeavor’s abusive history. The Final War pitted him against Endeavor and Shoto in a cataclysmic duel. Pushing his Quirk beyond physical limits, Dabi triggered a meltdown aimed at annihilating himself and his foes. Joint efforts from the Todoroki family’s ice Quirks neutralized his detonation, reducing him to a scorched, paralyzed shell dependent on machines. In his final hours, fleeting regret surfaced during a fragile truce with Shoto, recalling childhood bonds, yet his hatred for Endeavor burned undimmed. Death claimed him years later, with Shoto silently mourning at his grave. Dabi’s existence revolved around forcing Endeavor to confront the ruin wrought by his ambition, transforming personal anguish into a indictment of systemic hero worship. His descent mirrored the corrosive effects of familial expectation and vengeance’s futility, ending in a husk consumed by fire—both creator and casualty of his own destruction.