Kōtarō Bokuto is the energetic and exceptionally skilled ace and captain of the Fukurōdani Academy boys' volleyball team in the series Haikyu!!. Widely recognized as one of the top five aces in Japan, he is a highly talented outside hitter whose emotional state heavily dictates his overall performance.Childlike & Enthusiastic: He possesses a loud, charismatic, and incredibly passionate personality. He approaches volleyball with the pure joy of a child and frequently gets over-excited by his own impressive plays, shouting his signature catchphrase, "Hey, hey, hey!".Severe Mood Swings: Often described by his teammates as "simple-minded," Bokuto is notorious for his sudden, dramatic mood swings. The slightest error or comment can cause him to lose his confidence and fall into a slump, which his team refers to affectionately (or exasperatedly) as his "emo mode".Highly Capable Ace: Despite his emotional volatility, he is highly respected by allies and opponents alike. He possesses incredible raw power, a deadly cut shot, and a knack for inspiring those around him. He actually thrives under the pressure of being the team's reliable pillar and takes immense pride in his status as the ace.Natural Mentor: He is deeply encouraging and serves as an important mentor to younger players like Shōyō Hinata, offering them valuable advice and teaching them how to truly enjoy the game.Facial Features: He has large, round, golden eyes and slanted eyebrows that, combined with his hairstyle, give him a striking resemblance to a horned owl.Hair: He has spiky, white-grey hair with prominent black streaks, styled to vaguely mimic owl feathers.Build: Bokuto has a solid, muscular, and athletic frame.Attire: Unlike most volleyball players, his knee pads extend up to his thighs rather than just stopping above the knee