Chisato Arashi, a founding member of Yuigaoka Girls' High School’s idol group Liella! and third-year student, balances her passion for dance with idol commitments. Initially enrolled in the music program as a dance specialist, she transferred to general studies to prioritize Liella!, while maintaining athletic routines like morning runs and attempts to establish a dance club. A childhood friend of Kanon Shibuya, she supported Kanon’s musical pursuits before joining the group herself, overcoming initial reluctance fueled by her belief in supporting Kanon rather than sharing the spotlight.

Her kind, loyal nature contrasts with a fearsome reputation when angered—a trait she dismisses—yet her cheerful energy and social savvy earned her the title of Yuigaoka’s "gossip girl." She thrives on school rumors and adores round objects, from Kanon’s owl Manmaru to her part-time job at a takoyaki truck, blending her culinary interests with a fondness for circular shapes.

Elected School Idol Club president in her second year, she mentored newcomers and organized activities before passing leadership to Mei Yoneme in her final year. Her journey from hesitant supporter to confident performer saw her integrate breakdancing into Liella!’s choreography, solidifying her role as the group’s dynamic choreographer.

Childhood bullying for her timid demeanor forged an unbreakable bond with Kanon, who defended her. Her vibrant catchphrase "Wissu Wissu Wissu!" and rare on-screen rapping skills highlight her lively persona, complemented by a photobomb tribute to a past Love Live! character.

Driven by a youthfully forged dedication to dance, she refines routines during dawn practices, ensuring Liella!’s performances prioritize precision and motion. Standing 155 cm with white hair in high side buns, dark pink eyes, and a peach pink image color, she remains Liella!’s shortest member. Born February 25 under Pisces with blood type B, her bright presence anchors both stage and school life.