Mie Daiwa, known as Mie Delgado in localized versions, is the adoptive mother of protagonist Yamato Delgado. She adopted Yamato around age five after discovering he had been raised by wild cats in the wilderness, becoming his second mother responsible for his upbringing and well-being. She provides a stable home, showing consistent care for his development and safety.

She operates and manages a café in their town, recognized within the community as an excellent cook. This café serves as both her occupation and a recurring setting.

Her physical appearance features dark brown hair and light blue eyes. She is typically depicted in practical, long garments, specifically a red smock and yellow bandanna. She has double ear piercings and is not regularly described wearing other significant accessories.

Her established narrative role centers on her relationship with Yamato and her responsibilities as his caregiver and café owner during the timeframe of the initial series.