Hajime Iwaizumi is a fictional character from the anime and manga series Haikyuu!!. He is a third-year student at Aoba Johsai High and the vice-captain of the school's volleyball team, where he plays as a wing spiker and an ace. Iwaizumi is known for his strong sense of responsibility, leadership qualities, and athletic prowess on the court. As the childhood friend of the team's setter, Tooru Oikawa, Iwaizumi acts as a balancing force to Oikawa's more flamboyant nature, providing support and grounding for the team.