Shota Aizawa is a Pro Hero that goes by the name Eraserhead (given to him by fellow hero Present Mic). Unlike most heroes, he prefers working as an underground hero. He was assigned to be the Homeroom Teacher for Class 1-A in U.A. High School.
He is a very strict teacher that often tells lies or pulls “logical ruses” in order to make his students put their maximum effort into their training. He is infamous at U.A. for threatening students with expulsion from the school.