Izuku is a very timid, helpful, and polite boy, frequently overreacting to abnormal situations with exaggerated expressions. Due to being bullied since childhood for being born without a Quirk, he is initially portrayed as insecure, and being more reserved and non-expressive. These actions are especially present around Katsuki Bakugou, who constantly subdued him for his aspirations to be a hero. However, after being accepted into U.A HIgh School, making new friends, and facing Katsuki during the BAttle Trial Arc, he has gradually turned into a more confident and brave person, to the point of developing some leadership skills.

Nickname : Deku (Bakugou called him that) , Cute Cinnamon Roll