Kōtarō Bokuto, a third-year student at Fukurōdani Academy, commands the volleyball court as the team’s captain, ace, and wing spiker. His striking appearance features spiky white-grey hair with black streaks mimicking owl horns, piercing golden eyes, and a muscular frame, though his anime depiction slightly softens his athletic build compared to the manga’s rendition. After graduation, he reaches 190.3 cm in height, joining the MSBY Black Jackals as an outside hitter before ascending to the Japan National Team. Bokuto’s mercurial temperament blends exuberant playfulness, theatrical flair, and bursts of childlike enthusiasm, earning him a "simple-minded" label from teammates due to performance-altering mood swings. These dips into "dejected mode" see him retreating mid-match, requiring steady support from setter Keiji Akaashi to reignite his focus. Yet beneath this volatility lies sharp intuition, evident when he galvanizes Tsukishima Kei during a high-stakes match against Shiratorizawa or mentors Shōyō Hinata in advanced techniques like feints and block-outs. His volleyball journey began in childhood, marked by raw power that overwhelmed middle school peers. At Fukurōdani, he rose as a top-five national ace despite predictable cross shots. By refining straight spikes and diversifying his arsenal, he neared invincibility, though inconsistency initially barred him from the top three. A defining moment came during a training camp when he urged Tsukishima to seek visceral passion in volleyball—a philosophy mirroring his own evolution from erratic talent to strategic leader. The *Land vs. Air* OVA showcases Bokuto’s resilience during a clash with Nekoma High. Temporarily paralyzed by overthinking cross shots, he recalibrates with Akaashi’s tactical guidance, securing a nail-biting 28-30 victory. This match underscores his growing ability to conquer mental hurdles through teamwork. Post-high school, he sheds his inconsistency, emerging as a composed ace. His professional career introduces the lethal "Bokuto Beam" cross spike and a matured demeanor, solidifying his reputation. Distinctive traits include trademark thigh-high knee pads, a fervent love for yakiniku, and academic struggles—particularly in mathematics. His jersey number (4) honors Fukurōdani’s ace tradition, while his self-designed "Wisdom of the Ace" T-shirt reflects his unorthodox pride. Akaashi’s playful tally of 37 Bokuto weaknesses highlights fixations on singular tasks and a penchant for flashy theatrics, rounding out his vibrant persona.