Natsuhi Takenaka captains the Keishin Academy boys' basketball team, wearing jersey number 4. Standing 154 cm tall, he burns with competitive fire for basketball, viewing it as far more than a pastime. This intensity fuels his initial opposition to the girls' basketball team, perceiving their efforts as unserious and a drain on his team's crucial court time. Consequently, he supports his coach's decision to stake the girls' club's existence on a single match.

He shares a long childhood history with Maho Misawa and Saki Nagatsuka, though tensions rise after the girls' team forms, partly stemming from his view of Maho's fleeting commitment despite her athletic gift. His unrequited romantic feelings for Hinata Hakamada are common knowledge among classmates. He also has twin younger sisters, Hiiragi and Tsubaki Takenaka, who join the girls' team.

Natsuhi's outwardly stern demeanor often clashes with a softer, helpful side, particularly evident around Hinata. He frequently argues with Maho, though they ultimately reconcile. Witnessing the girls' dedication and passion firsthand shifts his hostility to secret support, leading him to acknowledge he underestimated their resolve. A competitive rivalry also sparks with Tomoka Minato, culminating in a free throw contest.

His surname, Takenaka, meaning "dweller amongst bamboo," and given name, Natsuhi, combining "summer" and "light," reflect facets of his identity.