Sayu Tsukisaka, a first-year middle school student at Takao Junior High, harbored aspirations to join Marehoshi Academy’s main campus until her parents’ disapproval of entertainment careers redirected her path. Undeterred, she channels her fervent passion for idols—honed through years of competition wins and auditions since elementary school—into founding an idol group at Takao. Her demeanor blends focused determination with flashes of tsundere-like sharpness, enforcing high standards on others while privately nurturing a tender side through poetry.

Standing at 155 cm, she sports long lilac hair, striking blue eyes, and a distinctive snaggletooth, complemented by a light-blue aesthetic. Her preferences lean toward soba and against multi-legged creatures. Familial strife erupts as her idol ambitions clash with her mother’s resistance, prompting a brief departure from home. During this period, she leans on clubmate Mana Shikimiya, revealing vulnerabilities that pave the way for reconciliation after proving her dedication to both family and craft.

As a driving force in transforming the Lyrical Tradition Dance Club into idol unit KiRaRe, she strategizes to avert disbandment and recruits members with relentless resolve. Her bond with Mana shifts from pragmatic collaboration to profound emotional reliance, marked by shared blushes, clasped hands, and a climactic confession where her parents tacitly acknowledge their connection. This evolution mirrors her journey from solitary ambition to collective leadership, prioritizing unity alongside personal goals.

Challenges like channeling poetic flair into songwriting and facing rival groups in Prism Stage contests test her adaptability. Through these trials, she sheds stubborn individualism, embracing resilience and creative compromise. Her growth culminates in a leadership style that harmonizes fierce ambition with unwavering investment in her peers’ triumphs, solidifying her role as KiRaRe’s anchor.