Kōenji, a university student and part-time manga artist, lives alone next door to the protagonist in a cluttered apartment strewn with neglected chores and microwave meal containers. Her first encounter with both the protagonist and the fox spirit stems from noise complaints, sparking suspicion about their relationship. This escalates when she misinterprets their playful antics as misconduct, nearly alerting authorities before homemade meals ease tensions.

An avid anime and manga enthusiast, she mistakes the fox spirit’s animal traits for cosplay inspired by *Little Yoko, Inari Girl*—a series she adores. This otaku passion softens her skepticism toward supernatural occurrences, allowing her to accept unusual explanations. Though dedicated to her manga craft, her artistic skills lag behind peers.

Her dynamic with Shiro, another fox spirit, revolves around competitive gaming sessions and snarky exchanges. She chastises Shiro’s laziness yet mirrors similar habits, from procrastination to untidiness. Despite their clashing personalities, they form an unlikely bond, with Shiro dropping by her apartment to game or raid her snack stash.

Beyond comic misunderstandings, Kōenji emerges as a recurring presence, joining group outings while anchoring the narrative’s ordinary world against supernatural absurdity. The anime amplifies her boisterous, exaggerated quirks, contrasting the manga’s portrayal of her as spacier yet less abrasive. Her background—family, academics, or long-term growth—remains unexplored, with her role confined to episodic, slice-of-life entanglements.