Hyougo Otoo (husband)
Hyougo's wife, who went shopping one day for some milk and has since been unable to find her way back home due to her terrible sense of direction. She has occasionally run into other members of the Wagnaria staff, but often mysteriously disappears soon afterwards. In reality, she navigates her way through the sewers, only stopping for milk at convenience stores, explaining why she and Otoo never cross paths.
Hyougo Otoo: Haruna's husband
Aoi Yamada: Aoi seems to be the only one capable of finding Haruna every time she goes missing. They have a close relationship for that reason.