 his flirtatious nature. and childishness, Oikawa is an excellent, well-rounded player and is extremely serious about volleyball. Oikawa has dark brown hair that is swept outwards and eyes of the corresponding color. his smug and outwardly flippant attitude. Oikawa also frequently makes cheerful remarks but follows up with serious or intimidating afterthoughts. He is extremely intelligent and cunning. Oikawa is ambitious and one-track-minded, but it's shown that he also has feelings of insecure.