Shintarō Kizaki is a third-year student at Souwa High School and a key member of the school's kabaddi team. Standing 175 centimeters tall and weighing 72 kilograms, he fulfills a primarily defensive role during matches. Kizaki frequently wears hair bands while playing, a noted hobby of his. Despite his senior status, he often clashes with the team's ace attacker, second-year student Ren Takaya. These recurring conflicts stem from Takaya's free-spirited behavior and remarks. Teammate Yu Eikura occasionally steps in to mediate or manage situations arising from the friction between Kizaki and Takaya. Kizaki possesses a personality that readily engages in confrontation, particularly in his interactions with Takaya.