Izuku is somewhat short for his age, his round face is framed by a short mop of fluffy dark-green hair which curls up at odd angles around his head, casting noticeably dark shadows onto itself. His eyes are large and somewhat circular and his irises are the same shade of green as his hair. Izuku is a very timid, reserved, and polite boy, frequently overreacting to abnormal situations with exaggerated expressions.