Atsumu's a carefree, self-assured person usually seen with a lazy smile on his face, enjoys provoking people & gives compliments offhand, can be quite condescending, somewhat self-centered, doesn't listen to others, doesn't return what he borrows & lies habitually. Perfectionist who has very high standards for himself & his spikers, if a spiker doesn't live up to his standards, he calls them trash. He's very sensitive, competitive & hates to lose, sometimes these traits can veer to the worst.