Description
Rin Hoshizora is a first-year student at Otonokizaka Academy and a member of the school idol group μ's, performing primarily in the subunit lily white. Her image color is yellow. She has short orange hair, light green eyes, stands 155 cm tall, and has a slim build with measurements of 75-59-80 cm (bust-waist-hips). Her birthday is November 1, making her a Scorpio, and she has blood type A. She loves ramen but dislikes fish.

Rin shares a deep, long-standing friendship with Hanayo Koizumi, dating back to childhood. Teased for wearing skirts during that time, she developed lasting insecurities about her femininity, leading her to avoid skirts and dresses outside the mandatory school uniform, preferring shorts or pants instead. Athleticism became her defining trait, excelling in sports like hurdling, soccer, and basketball. She exhibits cat-like mannerisms, frequently ending sentences with "nya" (meow) and making a signature curved-mouth expression, despite being allergic to cats and unable to adopt them. Rin possesses an exceptionally sharp sense of smell.

Energetic, optimistic, and tomboyish, Rin displays enthusiasm often compared to fellow μ's member Honoka Kōsaka. This similarity, along with Nico Yazawa, earned them the nickname "san baka" (three idiots) for impulsive actions like intense exam studying to qualify for the Love Live tournament. Highly athletic, on par with Eli Ayase, Rin serves as μ's practice leader with a focus on dance. Beneath her cheerfulness, she struggles with self-doubt about her appearance and femininity stemming from childhood teasing. Sensitive to others' opinions, she prioritizes their feelings, supporting Hanayo's shyness and motivating the group. A mischievous side includes playfully teasing Hanayo and hugging μ's members.

Significant development occurs in the anime's second season. Chosen as center for a performance requiring a dress, Rin initially refuses due to her insecurities. Encouraged by friends, she confronts her complex, wears the dress, and embraces her feminine side, marking a turning point that allows her to wear skirts confidently afterward. Her dedication sees her participating in training camps and contributing to performances like "Korekara no Someday."

In spin-off media like the *School Idol Diary* novels and manga, Rin's bond with Hanayo deepens, exploring implications of romantic feelings. One storyline depicts Rin declaring she "cannot live without" Hanayo and wanting to become her bride, culminating in an off-frame kiss from Hanayo, positioning them as one of the franchise's explored romantic pairings. Rin refers to herself in the third person and exclusively calls Hanayo "Kayo-chin."

Additional details include her role as the "smile" attribute representative among μ's first years and unique uniform choices like omitting a vest in summer. Her surname, meaning "starry skies," reflects thematic elements in her diary entries expressing wonder about nighttime performances. She is the only member shown leading warm-up exercises during group training camps.