Sou Inuoka is a first-year student at Nekoma High School and a member of the volleyball team, initially playing as middle blocker while wearing jersey number 7. With a lean build, he stands 185.3 cm tall and weighs 74.3 kg, sporting short, spiked brown hair and brown eyes. His birthday falls on November 1. Inuoka exhibits a bright and energetic personality, often displaying enthusiasm reminiscent of Shoyo Hinata. He is serious and passionate about volleyball, especially in his role as a middle blocker. Though not a quick thinker, he performs well with clear, focused tasks. Inuoka is caring and encouraging toward his teammates and does not hold grudges, as demonstrated when he is replaced as a starter by Lev Haiba but remains determined to improve. His skills include high agility and speed, with notable physical abilities reflected in a power rating of 4/5, stamina of 5/5, and speed of 5/5. His game sense and technique are rated lower at 1/5 each. This agility allows him to keep up with exceptionally fast players like Hinata, making him effective at blocking and adapting to opponents' rhythms during matches. Inuoka first appears during a practice match against Karasuno High, where he is assigned to mark Hinata due to his speed. He successfully blocks Hinata and Kageyama's quick set multiple times, becoming the first to do so. The match establishes a friendly rivalry between Inuoka and Hinata, with both players expressing mutual admiration. During the summer training camp, Inuoka is replaced as a regular by Lev but continues supporting the team from the sidelines, vowing not to be outdone. He participates in matches such as Nekoma vs. Fukurōdani and Nekoma vs. Nohebi, where he helps maintain team morale and assists injured teammates. At the Spring High National Tournament, Inuoka is occasionally subbed into games to assist with blocking, particularly against Hinata. In a match against Karasuno, he is briefly moved to the wing spiker position on Coach Nekomata's suggestion to add height to Nekoma's blocks. Despite some successful blocks, he struggles against evolved techniques like Hinata's "Bonsai Block." After high school, Inuoka becomes a childcare professional. He remains connected to his volleyball teammates, expressing interest in visiting Russia and participating in reunions.