Yurina Kimikage attends Nadeshiko Academy as a high school student. She possesses violet hair cut short with spiky bangs, striking red eyes, and a pale, slim physique measuring 163cm tall and weighing 45kg.

Afflicted by a chronic heart condition requiring surgery, Yurina maintains a pessimistic worldview, interpreting her illness as a curse. This belief fosters her quiet, reserved, and mysterious demeanor. She harbors a specific fascination with the language of flowers.

Records identify her as an orphan, though alternative accounts suggest familial conflict. These mention a mother opposing her artistic pursuits in favor of academics, and a complex relationship with her father, a successful artist. Yurina actively engages in painting, aspiring to become an artist herself, demonstrating determined pursuit of this passion despite obstacles.

Her impending surgery catalyzes the central plot involving a portrait. Daisuke Asō, a fellow art student experiencing creative block, is persuaded by his childhood friend to paint Yurina before her operation. Through the portrait sessions, Yurina gradually moves from isolation toward connection with Daisuke. Simultaneously, painting her portrait reignites Daisuke's artistic motivation.

Post-surgery, the narrative does not detail her recovery specifics or long-term health outcome. Her character development centers on facilitating Daisuke's artistic reawakening and the exploration of his relationship with his childhood friend, intertwined with her own struggle for self-expression and health management.