The God of Used Book Markets manifests as a child yet holds divine authority, presiding over the circulation of books within his domain. He wears a long shirt striped white and yellow, paired with a purple cape. His core duty involves guaranteeing book accessibility by combating artificial scarcity, frequently employing mischief like stripping price tags from overpriced volumes. He exhibits a dual nature: playful and prankish towards market patrons and stall owners, yet profoundly serious about his sacred responsibilities. This duality becomes evident when he enlists the black-haired maiden to aid in returning rare books hoarded by the collector Rihaku to general circulation at fair prices. His direct intervention enables the protagonist to acquire a specific childhood picture book during the used book festival. This character embodies the Shinto concept of "kami" inherent in cultural spaces, specifically acting as a guardian of literary interconnectedness and serendipitous discovery. He possesses encyclopedic knowledge of how every book links to others, symbolizing the narrative's exploration of fate and invisible ties. His actions champion the principle that books belong within a shared ecosystem, directly opposing Rihaku's monopolistic practices.