Mo Mo appears to be a delicate girl, yet she doesn't seem to be particularly interested in dressing up. Since she was young, she has been obsessed with the protagonist of the comic "Prince Cassaba from Outer Space". She deeply believes that one day Prince Cassaba from the comic will come to reality. She is a typical otaku. With her parents having passed away early, Mo Mo could only depend on her sister Chu Chu, but because of her sister's lazy personality, she also has to take care of her sister's daily life.