Mama is Mari-chan's mother, living with her family in an undisclosed location. Her central concern centers on Mari-chan's selective eating, specifically the child's dislike of carrots, peppers, and milk. This worry translates into Mari-chan's recurring dreams, where the young girl imagines being forced to eat these rejected foods.

To address the issue, Mama employs practical encouragement, like including carrots in Mari-chan's kindergarten lunchbox to promote acceptance. Her efforts align with the arrival of supernatural food entities—Ninninman, Piiman, and Milk—who step in to help Mari-chan. Mama's interactions with these entities are implied within the narrative but not explicitly detailed in available records. Her defined role focuses on supporting Mari-chan's nutritional development within the family dynamic.

No additional background, development, or expanded narrative roles for Mama are documented elsewhere in official media, including potential spin-offs or extended adaptations.