Motoya Komori is a second-year student at Itachiyama Institute who serves as the team's libero. He is widely recognized as the number one high school libero in Japan, a distinction noted in Volleyball Monthly. Standing at 1.80 meters tall with brown hair and brown eyes, his height is notable for a libero. Komori has a friendly and outgoing personality; he is quick to encourage and admire other players, such as when he strikes up a conversation with Tobio Kageyama at the national tournament. He is also the cousin of Kiyoomi Sakusa, Itachiyama's ace spiker, and shares a close relationship with him. Komori was invited to the All-Japan Youth Intensive Training Camp, highlighting his elite skill level. His motivation centers on mastering the libero position and contributing to his team's success. In the story, he is introduced during the national championship arc as a formidable opponent and a benchmark for other liberos. After high school, Komori becomes a professional player in the V.League for EJP RAIJIN and later earns a spot on the Japanese men's national volleyball team for the Tokyo Olympics. His abilities include exceptional receiving and defensive technique, supported by his height and agility, making him a reliable backbone for his team's defense.