A young girl, who is Hyuk's little sister. She is quite childlike and even a liar. She is part of the Helping Squad. She has a crush on Hyun. Shortly after being born, Eun and Hyuk's mother died. Only a few years later, their father's company goes bankrupt and the two are left at an orphanage, and their stay becomes permanent when their father dies in an accident. At the time, Eun was still very young; however, she did not appear to take the events well as she started an underage smoking habit. She and Hyuk eventually move to Green Home.