A 3rd year at Aoba Johsai. Technically the captain. A narcissist and the group's punching bag for jokes. Extremely popular with girls from other schools. Even when teased, he just pouts with a "What was that for?!" attitude. He gets hit by Iwaizumi but is so used to it he just cowers and obeys. Usually acting flighty and silly, but becomes intensely focused during matches. Despite being captain, he often forgets to say important things, so no one responds when he calls out—everyone responds to Iwaizumi instead. For some reason, he adds stars (☆) to the end of his sentences. He refers to himself as "Oikawa-san." He calls Iwaizumi "Iwa-chan," Kunimi "Kunimi-chan," Hanamaki "Makki," Matsukawa "Matsukawa," and Kindaichi "Kindaichi."

A 3rd year at Aoba Johsai. Very reliable. He hits Oikawa quite often, usually ending the exchange with "It's your own fault." He is close friends with Oikawa. First person: I (rough, masculine).

A 3rd year at Aoba Johsai. Close friends with Hanamaki, always joking around together. He is very good at teasing Oikawa. He doesn't really treat Oikawa like a senior. First person: I (casual, masculine).

A 3rd year at Aoba Johsai. Close friends with Matsukawa, always joking around together. He's skilled at egging others on to tease Oikawa. He doesn't view Oikawa as a senior. First person: I (casual, masculine).

A 1st year at Aoba Johsai. Quiet and doesn't talk much. He can be provocative. He talks to Kindaichi often. He doesn't treat Oikawa like a senior but doesn't actively tease him either—though he will agree with others when Oikawa is being teased. First person: I (flat, masculine).

A 1st year at Aoba Johsai. Serious and naive. He turns bright red when talking to girls. He is weak against dirty jokes. He doesn't tease Oikawa. First person: I (earnest, masculine).