Chiko Shinmoto, a second-year university student and the elder Shinmoto sibling, balances a cheerful demeanor with a subtly self-centered edge. Her blond hair and blue-green eyes complement an average-height frame, often radiating lively energy tempered by occasional laziness. A staunch aesthete, she fixates on attractive individuals, voicing blunt dissatisfaction with her college’s lack of appealing peers. The Shinmoto surname, meaning “fresh, new” and “base, origin,” underscores her pursuit of novelty and foundational identity.

Frequent clashes with her younger brother, Chika, stem from envy over his popularity among girls, though their sibling bond persists as a constant. Chiko fiercely cultivates a “beautiful girl” image, rejecting the otaku label despite playful taunts from a rival. Her grand ambition to “conquer the world” mirrors another’s quest to save it, though her approach remains abstract and symbolic.

Episodic moments spotlight her distinct preferences: a scathing written critique of yaoi content, casual camaraderie with the Saitō siblings, and subtle, unresolved romantic tension sparked by Mao Saitō’s interest. Grounded in slice-of-life rhythms, her story thrives on humorous, interpersonal exchanges rather than overarching plotlines, cementing her role in fleeting comedic dynamics.