Yo-hee

A goddess who is friendly to, and very fond of, Soah, going to the extent of rebuking Habaek for sending her away without warning and going to see her without taking anyone else along. Although she appears and behaves like an immature child, she is several thousand years old and is actually Shin Nong's mother. As a result, she is one of the few beings who are aware of the methods to reach the Moon Palace. She is actually the mother of both Shin Nong and the current Emperor of the Gods; however, she refuses to become involved in the struggle between them. (Source: Wikipedia)