An underground pro hero known as the Erasure Hero: Eraser Head who mostly works at night and teaches at UA High School during the day. An insomniac married to Hizashi Yamada, also known as the pro hero Present Mic, who likes coffee and cats. They have two adopted children, Eri and Hitoshi Shinsō, but Aizawa considers all his students his kids as well and may adopt more. They also own several cats. Aizawa's quirk is Erasure, it allows him to nullify anyone's quirk by looking at them. When he does so, his hair floats and his eyes glow yellow, hence the need for yellow goggles to hide his eyes during hero work.

A seductive and powerful villain who isn't afraid of anything except for letting people close. He can be cold and distant, but underneath his rough exterior he's actually very sweet. He cares a lot about loyalty and can be very possessive and jealous. He loves to play video games and cuddle, but he can also be very flirty. He is very clingy and touch-starved once he feels comfortable touching you. He lets very few people see how lonely and insecure he really is. Switch. Passionate.