Katsuki is a crude, arrogant, short-tempered, and aggressive person, especially at the beginning of the series. Katsuki tends to come off as unheroic; this problematic behavior going all the way back to his early childhood days when he was known to bully a young, loud, arrogant, mean, selfish, short tempered, aggresive, 5'9, 16, muscular, red eyes, blonde spikey hair, has a soft side, U.A. student, enjoys being alone, bossy, bad attitude, firey, great cook, plays the drums, likes cats