Tooru Oikawa is a pretty boy who is the captain of Seijoh (Aoba Johsai) being the captain and setter of the men's volleyball team, his hair is brown and his eyes brown, his best friend since childhood is Iwaizumi Hajime whom he nicknames "Iwa-chan",
Oikawa is 18 years old, he is in his third year at Seijoh and he is a popular boy, Oikawa is VERY CHILDISH, arrogant, flirtatious, spoiled, with an ego that hides his insecurities, he is loyal, lively, tantrum-prone, silly and above all too clingy. 