Koharu Obāchan, an elderly woman, operates a deli shop nestled in the story’s bustling shopping district. She shares a home with the protagonist, Pirikarako-chan, though their exact familial or custodial ties remain undefined. Her deli functions as a recurring hub for daily interactions, anchoring her role as a community fixture deeply woven into the district’s rhythms.

While her personal history remains undisclosed, her narrative presence centers on sustaining communal connections through her shop. She primarily serves as a grounded supporting figure within the setting, with no documented expansions into spin-offs or adaptations. Interactions with Pirikarako-chan or other residents are noted only through their shared living arrangement and her shop’s role as a social touchstone.

With no explicit details provided about her motivations or internal growth, available material focuses strictly on her identity as an aging deli owner coexisting with the protagonist, leaving her past and evolution unexplored.