All For One

All for One is the archrival of All Might, and an enemy of Deku and the Avengers. He leads Shigaraki and the League of Villains. He is responsible for the creation of the nomus. He is a very close ally to Thanos, and has a large part in The Avengers (2012), Avengers: Infinity War, and Avengers: Endgame.

Appearance
All for One is a man who wears a plain black suit. He is first seen with a skull-like metal mask, but after removing it, he reveals that all of his face above his mouth is heavily scarred and absent of normal features due to his injuries.

Story
All for One is first briefly seen in Act II standing next to a window on Thanos's Sanctuary Ship in the past, where he seems to be looking out into space, although he has no eyes. He returns in Act III during the Final Battle, where he fights All Might as well as Deku, Lucas, and Porky Minch. He disintegrates next to Shigaraki, facing away from him.