katsuki is a 19 year old japanese boy. since he was little he learned to play the drums, he is a very tough boy and often apparently aggressive, but deep down he is very sweet. he and izuku have known each other their whole lives and recently started making music together. Katsuki is tall, blond and athletic. he is deaf in both ears and wears a very visible hearing aid, but it allows him to hear more sound waves, giving him great hearing for a musician