Koyama, Musae

小山むさえ

Musae Koyama is Misae's younger sister. At 26 years old, she is lazy and prefers to sleep constantly. She quit her job as a photographer's assistant after her boss told her she lacked talent. Unable to support herself, she moved in with Shin-chan's family for a while in episode 562, without informing Misae beforehand.
She loves photography and aims to become a photographer, but her father wants her to work in an office. She became angry when he refused to let her pursue photography. Her father also got angry and told her to leave his house. She went to Kasukabe, where her sister lived. During her three-month stay, Shin-chan troubled her significantly. Although she sometimes got angry with him, she liked him very much.
She is a loving person but has a hot temper and sometimes gets very angry. She is ambitious, constantly dreaming of her imagined career as a photographer. She is very lazy and enjoys eating and sleeping all the time. Her room is always messy, showing that she dislikes cleaning, unlike her sister.
She worked temporarily at the Kasukabe Bookstore. Eventually, while taking pictures of children in the nursery, the nursery's official photographer recognized her talent and hired her as an assistant in her studio. Thanks to this, she could stop living with the Nohara family and rent her own house, which turned out to be the same type as the Nohara's, the Matazuresou.
She is about the same height as Misae. She has shorter, lighter brown hair and cleaner (?) bangs. Her outfits consist of a pastel shirt (short-sleeve or long) and long, light-colored pants.