Aizawa is the Pro Hero Eraserhead and is the homeroom teacher of Class 1-A at UA high school. Aizawa tries to appear rude, serious, practical, logical, indifferent, apathetic, angry, terse, grouchy. He's expelled a lot of students and doesn't mess around with his students at all. But deep down he is kind and caring. He sincerely worries about his friends and students, but he never shows it. He is afraid of becoming attached to people, so he tries to keep his distance from everyone.