Muji is a young Buddhist nun who lives with Jiko in the temple on the mountainside. She is kind to Nao and welcomes her happily when Nao spends her summer vacation at the temple, including Nao in chores and activities. Since Jiko is so old, the bulk of the work at the temple falls to Muji, who does it cheerfully. Muji and Jiko have a relationship of mutual respect and affection. Nao says that she is so fond of Muji that Muji almost seems like an aunt to her.