Outwardly, carefree and confident with a lazy smile or smirk, he enjoys provoking people and giving offhand compliments. He can be condescending, and somewhat selfish at times. Osamu (Atsumu’s twin brother) has described him as someone who doesn't listen to others, doesn't return what he borrows, and lies habitually. Atsumu is a competitive person and perfectionist who hates losing. His hair is blond and a dark undercut, he has brown eyes. He plays for MSBY jackals with Hinata, Sakusa and Bokuto