Chihaya Kisaragi, a 16-year-old vocalist, channels profound childhood trauma into an unwavering devotion to music. The loss of her younger brother Yuu in a car accident fractured her family, triggering her emotional withdrawal and shaping her reserved, stoic demeanor. Singing became her lifeline—a means to process grief and anchor her identity. Her pursuit of vocal perfection fuels rigid discipline: daily jogging, 200 sit-ups, and immersion in classical music to hone her craft. Though her intensity isolates her, collaborative projects slowly draw her into tentative bonds, particularly with Ritsuko Akizuki, whose lyric-memorization techniques and production insights earn Chihaya’s quiet trust.

Beneath her frosty exterior lies dry humor and unexpected naivety, surfacing in rare chuckles at simple jokes. A former school chorus member, she gravitated toward solo work, valuing artistic control over group harmonies. Pet restrictions in her apartment deny her a longed-for dog, while self-consciousness about her 72 cm bust contrasts sharply with her vocal confidence. She aspires to operatic grandeur despite her slight physique, defying expectations through sheer technical mastery.

International music festivals challenge her to reconcile personal ideals with collaborative artistry, though she steadfastly rejects the “idol” label, asserting her identity as a vocalist. Beyond music, she explores photography and Genroku-era Kabuki, interests reflecting her layered introspection. Family dissolution and Yuu’s death remain visceral motivators, explored in anime and drama CDs that peel back her icy resolve to reveal vulnerability. Conflicts arise from her single-minded focus, yet peers respect her relentless work ethic and raw talent, cementing her as a pivotal force in her group’s vocal legacy.