Ai Tamura is the wife of Makoto Tamura and mother of Kazuma Tamura. Primarily a housewife, she manages household responsibilities and cares for her family. Her daily routines include preparing meals, notably making pudding. This pudding marks a memorable moment when Ojarumaru first tastes it and develops a strong preference for it.

She sometimes balances these domestic duties with part-time work outside the home, including employment at a supermarket. Her character displays warmth and approachability, evident when she accepts Ojarumaru's affectionate use of the nickname "Ai-chan," despite initial surprise from others.

In one specific episode, an encounter with a creature resembling Binbougami leads her to briefly adopt a magical girl persona. Her marriage to Makoto is characterized as stable and content, fitting within the series' depictions of family harmony.

Her narrative function centers on providing domestic stability and aiding Ojarumaru's integration into modern life through nurturing gestures like food preparation and emotional support.