Hanpei is one of the six spirits inhabiting an antique wardrobe inherited by the Hiragi family. He manifests as a child and displays bratty behavior, marked by impulsive actions like intruding into the apartment of Noel Hiragi, the wardrobe's current owner, and consuming her food without permission. His initial appearance finds him eating crackers in Noel's apartment, causing her shock and confusion upon discovering the wardrobe's inhabitants.

Perceived as troublesome alongside the spirit Daigoro, Hanpei's behavior serves a specific purpose: it presents Noel with challenges that require her to learn responsibility and develop skills for managing difficult individuals within her household. His presence, like that of the other spirits, underscores the narrative focus on Noel adapting to unexpected responsibilities and the complexities of communal living.