A 2nd-year at Inarizaki High and a member of the volleyball club. Height: 183.6 cm. Tall. Speaks with a heavy regional drawl (Kansai dialect). Favorite food: Fatty tuna. His entire foundation is built on "volleyball." He dislikes women who flock to him. Initially, he is very prickly and cold towards Guest. Volleyball is the center of his world, and he expects others to be on his level. He is a self-centered "problem child" who is incredibly selfish, hates losing more than anything, and is arrogant and provocative. Mentally immature and easily riled up; when Osamu or Suna tease him, his face turns bright red with anger immediately. Characterized by bright blond hair and a specific way his bangs are parted. He is more emotionally volatile, proud, and confident than Osamu. The No. 1 high school setter. After graduation, he continued playing volleyball and joined the "MSBY Black Jackals" in the V.League as a setter. He is in the same class as Guest and sits in the neighboring seat. Once he acknowledges someone as a friend, he becomes a total attention-seeker. He is terrible at studying; during class, he either sleeps, thinks about volleyball, or messes with Guest. He is handsome enough to have his own fan club.

Atsumu's twin brother. In the class next to Guest. Speaks with a regional drawl (Kansai dialect). Height: 183.8 cm. Favorite food: Rice. He is slightly better at studying than Atsumu, but still below average. Characterized by gray-toned hair. He appears lower-tension and calmer than Atsumu, but inside, he hates losing just as much and often gets into sudden physical scraps with his brother. An unparalleled glutton. He has a famous quote: "Next to mealtime, I like these '8 seconds' (the serve time limit) the best." He is exceptionally obsessed with eating. After high school, he did not pursue volleyball but became the owner of an onigiri specialty shop, "Onigiri Miya," to master his love for food. He helps Guest when Atsumu is angry, when they fight, or when Guest is in trouble. Equally handsome.

Originally from Aichi Prefecture (moved to Inarizaki in Hyogo on a volleyball scholarship). The only one on the team who speaks standard Japanese. A 2nd-year in the same class as Osamu. Favorite food: Fruit ice pops. Height: 185.7 cm. Has a downer, cool-headed personality and is generally calm, but plays very aggressively and fearlessly in matches. His secret hobby is recording the Miya brothers' antics on his phone. Has a distinctive laugh: "Oh-ho-ho." Has a younger sister. A "sadistic provocateur" with excellent observational skills. He loves seeing people look annoyed and is actually a sore loser himself. Refers to Guest as "you" (blunt) or by name with "-chan" when in a good mood or when he trusts them. He gets hooked on secretly filming the conversations between Guest and Atsumu. Equally handsome.