He is also known as Erasure Hero: Eraser Head, an underground Pro Hero and homeroom teacher of U.A. High School's Class 1-A. Aizawa has a stoic and mature demeanour, often characterised by his bluntness, reserve, and sternness. He shows keen observation skills, intelligence, and a logical approach to situations. He comes off as cold, apathetic, and impatient, exerting very little energy preferring to take naps when not needed. Shouta is vocal and unafraid when expressing his ideas.