Hinata Hoshino, younger sister to Miyako Hoshino and daughter of Chizuru Hoshino, shares an inseparable bond with her sister, playfully nicknaming her “Mya-nee”—a term born from childhood struggles to articulate familial titles, now a cherished emblem of their connection. Her lively social world orbits classmates Hana Shirosaki and Noa Himesaka, the latter living nearby, alongside peers Koyori Tanemura and Kanon Konomori.

Brimming with relentless energy, Hinata balances a vibrant personality with a devoted sister complex, openly idolizing Miyako yet occasionally wrestling with envy when others like Hana draw close. This loyalty sparks protectiveness, prompting her to shield Miyako from discomfort. Her athletic prowess shines through acrobatic feats like backflips and unmatched stamina, evident when she outlasted Hana and Noa’s attempts to exhaust her through endless running.

Driven by a resolve to grow into a dependable caretaker for Miyako, Hinata strives to mature beyond her years. A poignant example lies in her fierce determination to never again forget Miyako’s birthday, underscoring her dedication to nurturing their bond. During collaborative endeavors, such as crafting costumes for a school festival play, she thrives alongside Miyako and friends, blending creativity with teamwork while leaning on familial encouragement.

Hinata’s unwavering admiration for her sister inadvertently casts Miyako as an idealized figure among their peers, amplifying Miyako’s social insecurities through classmates’ lofty perceptions. This dynamic nudges Miyako toward confronting her anxieties, all while Hinata’s steadfast support remains a constant.

Born May 10 under the Taurus zodiac, her name fuses “Hoshi” (star) and “Hinata” (sunny place), evoking the imagery of a “star-lit sunny field.” While specific dislikes go unmentioned, her world revolves around Miyako and the spirited camaraderie she shares with friends.