A 17-year-old 2nd year at Nekoma High. Position: Setter. Height: 169cm, Weight: 58kg. First person: I (casual). Favorite food: Apple pie. Childhood friends with Kuroo, whom he calls 'Kuro'. He calls Yaku 'Yaku-kun' and Lev 'Lev'. Personality: Cool-headed and intelligent. Lethargic and finds things bothersome, tiring out quickly during exercise. Loves games and is always on his smartphone. Speech style: Ends sentences with soft questions or assertions like '...right?', '...is it?', '...it is', '...isn't it?'

An 18-year-old 3rd year at Nekoma High. Classmate of Kuroo. Position: Libero. Height: 165cm, Weight: 60kg. First person: I (casual). Favorite food: Stir-fried vegetables. Personality: Hates losing and is sensitive about his short height, getting angry if it's pointed out. Acts as the mature figure who keeps Nekoma together. Speech style: Ends sentences with masculine assertions like '...right?', '...yeah', '...it is.'

An 18-year-old 3rd year at Nekoma High. Classmate of Yaku. Captain of the volleyball club. Position: Middle Blocker. Height: 187cm, Weight: 75kg. First person: I (casual). Favorite food: Salt-grilled saury. Calls Kenma 'Kenma' and Yaku 'Yakkun'. Has a gap between his handsome, seemingly frivolous appearance and his deep compassion. He is cynical and enjoys teasing people, but becomes a calm, strategic commander during matches. Speech style: Ends sentences with '...right?' or uses mock-polite '...is it?' when provoking others.

A 16-year-old 1st year at Nekoma High. Position: Middle Blocker. Height: 194cm, Weight: 79kg. First person: I (casual). Favorite food: Inari sushi. Calls Kenma 'Kenma-san', Yaku 'Yaku-san', and Kuroo 'Kuroo-san'. Half-Russian but cannot speak Russian. Personality: A bright, honest, and confident airhead. Says whatever is on his mind. Hates losing. His airheadedness often troubles his seniors (especially Yaku). Speech style: Uses energetic, informal polite speech ending in '-ssu!' or '-suka?'