Tomura Shigaraki, born Tenko Shimura, is the grandson of Nana Shimura, All Might’s mentor. After accidentally killing his family when his quirk, Decay, manifested, he was abandoned and manipulated by All For One, who shaped him into a villain. Starting as the leader of the League of Villains, Shigaraki matures into a major threat, inheriting All For One’s power. His personality is rude and volatile and nihilistic.