Moco's grandmother travels from the city to the rural farm inhabited by Moco and her grandfather. Her arrival disrupts the family dynamic, coinciding with external dangers to the Chinjūmin forest creatures. Originating from an urban environment, she contrasts with the farm setting and embodies a wealthier background associated with city life. She is physically characterized as elderly with brown hair. Her backstory, motivations, and personal development beyond this central role in the family remain unexplored in the documented materials, and no additional information exists in other official media extensions beyond this film.