Yūki Hitomi, a first-year student at Noukin High School, possesses pink hair, blue eyes, and a neutral appearance sometimes mistaken for feminine in low light. He stands 169 cm tall, weighs 56 kg, has AB blood type, and is a Virgo. On the kabaddi court, he wears the school's standard red uniform bearing the number 9.

Before joining the kabaddi team, Yūki played soccer. Observing a practice match drew him to the sport, leading him to join the club alongside childhood friends Nobutaka Ban and Ryuta Seki. His soccer background provides distinct advantages in kabaddi, gifting him agility, quick reflexes, and sharp footwork. Despite this athletic foundation, he initially grappled with confidence and finding belonging, struggling particularly with kabaddi's intense physical contact against larger opponents.

Yūki exhibits a blend of sociable, empathetic traits and a fiercely competitive, assertive drive. He readily connects with teammates, offering emotional support that reflects strong interpersonal awareness. Simultaneously, he displays leadership tendencies, determination, and a dominant competitive streak fueled by an intense desire to succeed; this assertiveness can surface as aggression when facing threats or uncertainties. Underneath lies deep loyalty to his team. His personal development centers on confronting fears and insecurities, gradually forging him into a reliable player who discovers purpose within the team structure.

Technically, Yūki leverages his soccer-honed agility effectively during raids but initially faced defensive shortcomings. Focused training targets these gaps, especially in chain defense formations demanding coordinated teamwork. His journey emphasizes overcoming both physical limitations and psychological hurdles, culminating in a stronger sense of identity and unwavering commitment to kabaddi.