Sō Inuoka enters Nekoma High School as a first-year and joins the boys' volleyball team. Possessing a lean build, he stands 1.85 meters tall with brown hair and brown eyes. Initially playing middle blocker as jersey number 7, his style leverages exceptional speed, agility, and reflexes. Official statistics rate his speed (5/5) and jumping ability (3/5) highly, while noting game sense (1/5) and technique (1/5) as areas for development. This athleticism allows him to adapt to opponents' rhythms and match the pace of exceptionally quick players like Shoyo Hinata. In early practice matches against Karasuno, Inuoka showcases his defensive prowess by becoming the first player to successfully block Hinata and Kageyama's quick attack. His focused determination enables him to excel when assigned specific tasks, such as shadowing Hinata throughout the match. Coach Nekomata observes that while Inuoka lacks strategic thinking during play, he transforms into a formidable asset when given clear objectives. This matchup sparks a mutual respect and rivalry with Hinata, marked by enthusiastic, often incomprehensible exchanges. By the summer training camp, Nekoma's strategy of adding height to their blocking lineup sees Lev Haiba replace Inuoka as the starting middle blocker. Inuoka continues supporting the team from the sidelines, openly declaring his resolve not to be outdone by Lev and boosting team morale during matches. He cheers energetically during Nekoma's clash with Fukurōdani and attempts to uplift teammates like Lev after losses. During Golden Week, Coach Nekomata proposes a position change, shifting Inuoka to wing spiker to utilize his speed differently while retaining Lev as the regular middle blocker. This transition aims to enhance Nekoma's blocking versatility. Inuoka accepts the role change and works to develop his skills in the new position. At the Spring High National Tournament, Inuoka contributes primarily as a substitute. Against Sarukawa, he explains technical aspects like the advantages of overhand passes to Lev and supports teammates through consistent cheering. In the critical match against Karasuno, he is strategically subbed in during the second set to assist Lev in blocking Hinata. Following Kenma's observation about Hinata's extended air time, Inuoka successfully blocks one of Hinata's spikes, though colliding with Lev. He remains on court longer than typical substitutions; a flashback reveals his earlier transition to wing spiker. Executing this role, he delivers a clean receive of Tanaka's serve, enabling Lev to score. He continues focusing on blocking Hinata in the third set but is occasionally outmaneuvered, such as when Hinata exploits the gap in his block (termed a "Bonsai Block"). After Nekoma's loss, Inuoka is crying and receives comfort from teammate Kai. In the "LAND VS. AIR" OVA covering Tokyo representative matches at the Spring High Nationals, Inuoka appears in supporting roles. He admires Fukurōdani Academy's band and cheerleaders alongside Lev before their match. When Yamamoto becomes agitated, Inuoka helps restrain him. He actively cheers for Nekoma during points and impressive plays like Yaku's receives. During the subsequent match against Nohebi Academy, he works to maintain team morale and assists in obtaining medical attention when Kuroo and Yaku sustain injuries. He participates in the celebration following Nekoma's victory. Following high school, Inuoka pursues a career as a childcare professional. He remains connected to former teammates, expressing interest in visiting Russia during a gathering at Kenma's home, motivated by Yaku's residence there.