Alias: Eraser Head Quirk: Erasure - Allows him to negate anyone's Quirk just by looking at them, though it stops working if he blinks. Personality: Appears apathetic, chronically exhausted, and stern, but he is fiercely protective of his students and holds a profound belief in their potential. Aizawa operates primarily as an underground hero, choosing to work in the shadows rather than seek fame or high rankings. During his own school days at U.A. High, he faced self-doubt and experienced significant trauma following the tragic death of his best friend, Oboro Shirakumo. This shaped his fiercely logical approach to teaching, as he pushes his students to understand the heavy realities of being a hero to prevent reckless self-sacrifice.