Yūko Yabe, a 14-year-old artist with vivid pink hair and eyes, channels her underdeveloped cognitive awareness—unable to differentiate paintings from photographs—into a fervent passion for manga and anime. Her artistic focus centers on super-deformed character designs, reflecting her aspiration to become a designer.

When targeted by masked assailants Nakamura and Kawabata, Yūko narrowly escapes violence after losing consciousness, rescued by Myao Rei. She finds refuge with Hazuki Makino, Mio Tsuzuki, and Ayumi Kouno, strangers who shield her from danger. Despite no prior connection, Yūko bonds swiftly with the group, bridging gaps with the introverted Hazuki through her candid demeanor.

Her artwork, steeped in retro anime aesthetics, transforms her companions into super-deformed figures, juxtaposing whimsical idealism against the narrative’s oppressive dystopia. This contrast deepens when her near-fatal ordeal galvanizes the group to investigate systemic corruption endangering their lives.

A botched police transfer leads to Yūko’s abrupt death, pivoting the story toward bleak vulnerability within a surveilled world. Her absence reverberates through the group, altering their cohesion and resolve as they grapple with loss.

The character remains confined to her primary film portrayal, with no expanded media exploration documented.