Sara Midorikawa stands out with her striking emerald hair, cut in sharp angles, and magenta eyes accentuated by a persistent curled cowlick. At 163 cm, she towers over her peers, her tall, slender frame clad in a modified school uniform featuring a blue necktie over the traditional pink bow. A self-proclaimed tomboy with a rock-and-roll edge, she masks a secret passion for fluffy plush toys and all things cute, a contrast to her aloof exterior. Initially a second-year middle school student, she advances to high school by her third season, balancing academic transitions with idol commitments.

As Meltic StAr’s guitarist and Romance Beat specialist, Sara channels her creativity into improvised songwriting. Her bond with childhood friends Anna Akagi and Mel Shido anchors the group, with Sara tempering Anna’s spontaneity while navigating a playful rivalry with Suzu Kurokawa, who secretly respects her as a leading cool-type idol. Her trust in Mirai Momoyama unveils her hidden whimsy, sparking collaborations like covert bunny café visits.

Competitions like the Jewel Auditions and Princess Cup test her growth, earning her a Jewel Coord on her first attempt and the Illuminage Queen title through mascot-themed challenges. A virtual musical arc sees her attending Fateful Garden High School, honing her "Fateful Power" amidst peers, symbolizing her adaptability across evolving roles.

Family ties include parents and a younger brother, Taro. Her name echoes her traits: "Midorikawa" (green river) mirrors her hair, while "Sara" (princess/independent) reflects her poised ambition. Born on June 9—Japan’s Rock Day—her steak preference, blood type O, and covert plushie hoarding round out a persona balancing rebellion and softness.