Aya emerges as a sharp-tongued, popular student whose mean-spirited jabs at Satomi trace back to a pivotal incident: Satomi’s report of students smoking in the computing room triggered disciplinary measures against star soccer players and public scorn for Satomi, fueling Aya’s resentment. Her antagonism intertwines with unspoken feelings for Gocchan, a academically and athletically gifted classmate. When Shion, an AI disguised as a transfer student, seemingly kisses Gocchan during practice, rumors ignite Aya’s jealousy, propelling her to confess her emotions during a rain-soaked confrontation. This vulnerability sparks a romantic shift with Gocchan, softening her hostility.

Shion’s presence subtly steers Aya toward honesty, evident when she joins a mission to rescue the AI from corporate deletion. Disguising herself as Shion to mislead pursuers, she flees on a motorbike alongside Gocchan, wryly likening their escape to a film scene. Her "chameleon" knack for blending—once a shield for insecurities—morphs into genuine adaptability as she reconciles with Satomi and supports the group’s efforts. Shedding jealousy for open communication, she evolves into a loyal ally, her arc closing with fortified bonds and self-assurance, particularly in her relationships with Gocchan and Satomi.