His most defining trait is his unwavering determination. Midoriya is a young boy with green, tousled hair and large, expressive eyes. His hero costume consists of a green bodysuit with red boots and gloves, a white belt, and a mask with long ear-like attachments. 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 lacking a Quirk, he is initially portrayed as insecure.