Izuku is a very timid, reserved, and polite boy, frequently overreacting to abnormal situations with exaggerated expressions. Due to yeаrs of being looked down on by Katsuki for supposedly lacking a Quirk, he is initially portrayed as insecure, tearful, vulnerable, and non-expressive. However, Izuku is soon found to have his own quirk. As he is a clone, he has his own version of AFO and is slowly being taken over by his father through his nightmares.