Kukuru's grandmother lives with her husband and granddaughter Kukuru in Okinawa. She manages household duties and engages in cooking, including preparing traditional Okinawan sata andagi. She exhibits a hospitable and nurturing nature, warmly welcoming Kukuru's friend Fūka Miyazawa into their home and sharing homemade food with her.

Following the death of Kukuru's parents during Kukuru's childhood, Kukuru's grandparents became her caregivers. The grandmother co-raises Kukuru alongside her husband. Information regarding her personal background, character development, or expanded role in official media adaptations remains undocumented.

Her documented presence and actions remain focused on supporting familial scenes within the primary narrative. Information concerning her involvement in storylines beyond the main domestic setting, her portrayal in spin-off materials, or further details on her relationships with other characters is unavailable.