Tomura Shigaraki, born Tenko Shimura, emerged from a family fractured by generational trauma. His father, Kotaro Shimura, harbored a bitter resentment toward heroes after being abandoned by his own mother, Nana Shimura—a former wielder of One For All—and channeled this hatred into relentless abuse toward Tenko. The boy’s innocent admiration for heroes clashed violently with his father’s prohibitions, resulting in physical violence and emotional isolation. A fateful encounter with All For One, disguised as a civilian, irrevocably altered Tenko’s path when the villain implanted the Decay quirk within him. The quirk’s accidental activation led to the disintegration of his dog and sister, cascading into the annihilation of his entire family. Left alone amidst the rubble, ignored by onlookers, Tenko fell under All For One’s influence, who weaponized society’s apathy to nurture his rage. Reborn as Tomura Shigaraki under All For One’s tutelage, he adopted mummified hands from his deceased family as macabre emblems of his anguish. These relics functioned as both psychological shackles and catalysts for destruction, with his father’s hand perpetually obscuring his face. Over time, the hands were shattered or cast aside during conflicts, mirroring his incremental break from his traumatic past. Initially erratic and juvenile in his actions, Tomura matured into a calculating strategist. Merging the League of Villains with the Meta Liberation Army to establish the Paranormal Liberation Front, he underwent extensive bodily augmentation to amplify his Decay quirk, acquiring regenerative capabilities and sensory enhancements. Yet inheriting All For One’s quirk ignited a brutal internal conflict as the original wielder’s vestige sought to possess him. Defying this takeover, Tomura wrested back control, sharpening his resolve to obliterate the society that had rejected him. His Decay quirk escalated catastrophically, enabling mass devastation. During the Final War, Quirk Singularity warped his body into a monstrous form riddled with protrusions and armored bulk. However, relentless quirk usage eroded his physical stability, culminating in a decisive clash where Izuku Midoriya disrupted All For One’s vestige. Tomura’s subsequent disintegration hinted fleetingly at the fractured humanity buried beneath his wrath. Despite his villainy, Tomura fostered genuine loyalty among the League of Villains, defending them as kin and retaliating against their harm—a stark departure from All For One’s exploitative methods. This bond mirrored his yearning for the familial connection denied in his youth. His narrative wove a grim tapestry of societal neglect, trauma’s generational echoes, and the destructive ideologies born from such voids. Though irredeemable in action, his origins and struggles framed a complex portrait of cycles perpetuated by indifference and manipulation.