| Yoo Dan Ah (유단아) | |
|---|---|
| Age | 17 years old |
| Debut | Chapter 0.1 |
| Gender | Female |
| Hair | Violet |
| Eyes | Amethyst |
| Father | Yoo Ja Gyeom |
| Mother | Unnamed Mother |
| Love Interest | Yi Won |
Yoo Dan Ah is the daughter of Prime Minister Yoo Ja Gyeom and her late mother. During her childhood, her mother was ill and she went out to look for the red medicinal herb, much to her father's dismay. While searching, she came across the Bi Hwa Rim where she found the herb and also met Yi Hwi who sang her a lullaby called Butterfly. She grew up finding this boy who saved her and mistook Yi Won who sang the lullaby though it was actually Yi Hwi. She is a fan of Hong's paintings and later on became close friends with him. She has an unrequited love for Yi Won. She is the student of Nabi whom her father hired in order to prepare her as the consort of the emperor who she does not know yet.