Ibuki Hinata is a second-year student and class representative at Yamabiko South Academy, serving on the student council with excellent grades. She shares a deep, long-standing childhood friendship with Ui Nakatsugawa. An active archery club member since middle school, her notable skill earned her the school nickname "Robin Hood," and she trains intensively for prefectural tournaments.

Physically, Ibuki has lilac hair often accessorized with a black hairband featuring two bells on one side, blue eyes, a height of 151 cm, a slim build, and a pale complexion.

Ibuki initially displays a harsh, distrustful attitude toward Kazuma Hoshino after witnessing him accidentally kiss Ui, openly opposing their interactions while striving to project composure. Her personality exhibits classic tsundere traits; she gradually develops genuine feelings for Kazuma but struggles to express them openly. She shows strong protectiveness toward Ui and moments of tenderness and shyness, particularly in private or vulnerable situations. Embarrassment often triggers physical aggression, like kicking Kazuma after comments about her chest size or indirect kisses.

Her relationship with Ui is central, marked by unwavering loyalty and caretaking despite Ui's airheaded nature. Her interactions with Kazuma evolve from hostility to reluctant affection. In the visual novel, she confesses during a date, becomes his girlfriend, and engages in a romantic relationship. In the anime, her park confession leads to rejection, though she later supports Ui in expressing feelings to Kazuma. Her archery involvement recurs; the OVA depicts her using Daigo Minamikokubaru as a comedic practice target.

Her development centers on reconciling outward toughness with emerging vulnerability. While publicly reserved about emotions, her actions increasingly reveal affection, like participating in group events involving Kazuma and privately acknowledging her feelings. This duality persists across all media, though her romantic outcomes vary by adaptation.