Tomura Shigaraki

Tomura Shigaraki, born Tenko Shimura, is the leader of the League of Villains and the primary antagonist of My Hero Academia. He is the grandson of Nana Shimura, the seventh holder of One For All, and was raised by All For One to become the ultimate symbol of fear. His Quirk, Decay, disintegrates anything he touches with all five fingers, and it evolved to spread beyond direct contact, capable of destroying entire city blocks. After undergoing the Doctor's procedure, he gained immense physical enhancements and inherited All For One's Quirk, making him one of the most powerful beings in existence.