Hajime Iwaizumi

Height: 179.3 cm

Team: Aobajousai High School

Year: 3rd Year, class 5

Number: 4

Position: Wing Spiker

Ability Parameters (out of 5): Power = 5; jump = 4; stamina = 4; intellect = 3; technique = 3; speed = 4

Is a third-year student from Aoba Johsai High; he is the volleyball team's ace, vice-captain and a wing spiker. He is also Tōru Oikawa's childhood friend and "pillar". Iwaizumi often gets irritated by Oikawa's behavior and tells him that guys who have girls going kyaa kyaa over them irritates him the most.