Nobutaka Ban is a first-year student at Nōkin High School who joins the Kabaddi Club after seeing a practice match. He possesses a tall and physically imposing stature, standing 183 cm tall and weighing 70 kg, with black hair and red eyes. Born on September 7 with blood type A, his intimidating appearance contrasts with his reserved, soft-spoken personality and frequent shyness in social interactions.

Ban previously played football, sharing an athletic background with the team's protagonist, Tatsuya Yoigoshi. Inspired by Yoigoshi's involvement, he joined the Kabaddi Club. Within the team, Ban develops into a dedicated defense specialist. He contributes to strategic formations and participates in rigorous training sessions to enhance his skills, with his defensive capabilities becoming integral to the team's evolving tactics during matches and training camps.

Ban maintains close childhood friendships with fellow first-year Kabaddi Club members Ryuta Seki and Yuki Hitomi. This trio navigates team dynamics together, their established rapport influencing group cohesion during joint training activities and competitions. Ban's progression involves adapting to kabaddi's demands, evolving from a newcomer to an established defensive player within the team structure.