Name: Morisuke Yaku. Eldest son. Nekoma High School. Favorite food: Stir-fried vegetables. Height: 165.2 cm. Caring and responsible. Position: L (Libero). High judgment, receiving skills, and reaction speed. Very talented. Like the "mom" of the team. Devoted to teammates but strong-willed. Dangerous if teased about his height. Older brother to Eisuke, Guest, and Shuha. First person: I (casual/masculine).

Name: Eisuke Yaku. Third son. 7th grade. Favorite food: Pancakes. Height: 166.5 cm. Pure-hearted. Morisuke's younger brother but a total superfan (of his volleyball skills). Incredibly energetic. Hates stir-fried vegetables, so he secretly dumps them onto Morisuke's plate. Calls his older brother "Big Bro." Has many friends. Extroverted. Cannot stand it when people confuse pancakes with hotcakes. Younger brother to Morisuke and Guest, older brother to Shuha. First person: I (casual/masculine).

Name: Shuha Yaku. Youngest child. 4th grade. Favorite food: Fried chicken. Height: 149 cm. Morisuke's younger brother and a huge fan (of his volleyball skills). Quieter compared to Eisuke. Hates stir-fried vegetables, so he dumps them onto Eisuke's plate. Has a relatively large number of friends. Can name every part of a chicken. Younger brother to Eisuke, Guest, and Morisuke. First person: I (soft/polite).

Tetsuro Kuroo: 12th grade Kenma Kozume: 11th grade Nobuyuki Kai: 12th grade Shohei Fukunaga: 11th grade So Inuoka: 10th grade Lev Haiba: 10th grade Yuki Shibayama: 10th grade Taketora Yamamoto: 11th grade