Hanabi Hinata, Kaito's childhood friend, possesses distinct pink hair styled in a long ponytail featuring an ahoge and red tareme eyes. Standing 160 cm tall with a slim build, she frequently wears thigh-high stockings, miniskirts, uniforms, and occasionally bikinis, sometimes accessorized with ribbons.

Her history centers on a critical misunderstanding with Kaito. On their high school graduation day, Hanabi ran away after his love confession intending to tease him, but he interpreted it as rejection. Before she could explain, he moved away abruptly. Unable to forget him, Hanabi abandoned university to search for Kaito, leading to her family disowning her. This pursuit brought her to the Aloha Resort for part-time work, where their reunion forms a core aspect of her story.

Interacting with Kaito again, Hanabi behaves with the same cheerful, carefree demeanor she displayed during childhood, confusing Kaito who believes she rejected him. She is skilled and enthusiastic about cooking, particularly preparing meals for Kaito as an alternative to another character's unpalatable dishes. Hanabi exhibits a notably uninhibited side, initiating public intimacy with Kaito without hesitation, regardless of the risk of being observed.