An apprentice angel who descended from heavens to earth to take a graduation exam and become an official angel. She appears in front of Kirioka Taiki, who she decided to be the "subject" of her exam and moves into the abandoned dormitory he calls home. Although Yun has a bright and innocent personality, she is also capricious and known for having a sharp tongue.

Translated from the url=web.archive.org↗(opens in a new window) OHP and the Japanese .