Hajime Iwaizumi

Hajime Iwaizumi (岩泉 一, Iwaizumi Hajime) is a third-year student at Aoba Johsai High. He is the team's ace and vice-captain. Iwaizumi is a stern but kind person.Since childhood, Iwaizumi has been close friends with Oikawa. The two are often shown watching volleyball matches on television and playing volleyball in their free time.Iwaizumi is a stubborn but reliable teammate, often filling in Oikawa's spot as a morale booster if needed. He acts supportive to all, including Tobio Kageyama.