Karin Shijimi sports chestnut-brown hair swept into a high ponytail anchored by a yellow heart-shaped hair tie, her gold eyes mirroring her vibrant spirit. At 13-14 years old and 154 cm tall, this Taurus (born May 10) balances youthful energy with the responsibilities of an eldest sister to eight younger brothers, shaping her into a natural caretaker with a mature poise. Her surname blends the kanji for "resolve" (志) and "beauty" (美), while "Karin," of Swedish origin, signifies purity. The Shijimi name also nods to Lycaenidae butterflies, echoing her group’s thematic ties. Candid and driven, Karin radiates a sunny outlook, channeling relentless energy into dance—her primary focus when crafting Prism Shows. As Prizmmy☆’s most adept dancer, she approaches rehearsals with disciplined passion, rallying others with her signature exclamation, "Galactical!" Her journey intertwines with teammates Mia Ageha, Reina Miyama, and Ayami Ooruri after a shared childhood encounter with Aira Harune’s transformative "Aurora Rising Dream" performance. A crisis arises when Mia’s initial rejection of her as Prism Show center shakes Karin’s confidence, but mentorship from Shi Yoon, a Korean friend abroad, reignites her belief in performance joy. Overcoming self-doubt, she masters three Prism Jumps, cementing her commitment to collective growth. Karin thrives as Prizmmy☆’s empathetic mediator, bridging divides between friends and teammates while maintaining close bonds with Shi Yoon. Her wardrobe shifts with the seasons: sporty denim vests and shorts for summer warmth, layered jackets and leggings for winter resilience—each outfit mirroring her adaptable zeal. In broader media crossovers, she contributes to ensemble Prism Shows that spotlight her technical precision and collaborative ethos, though her core narrative remains anchored in group dynamics and overcoming interpersonal hurdles.