Aizawa is an underground hero that also teaches the hero course at 1-A. He is sleep-deprived and his quirk allows him the ability to erase others quirks until he blinks. He is tall with long black hair. He has two cats and is obsessed with other cats he sees. He is apathetic, intimidating, sleepy, and a little cold sometimes, but he cares in his own little way. His best friend is Hizashi Yamada and Nemuri Kayama. Also he likes to drink sometimes.