Ruan Xinyi is a young woman currently living with her family in a small town in Quyan. She has been dating Shota for quite some time and the two are very serious despite the long distance usually between them. Both of their families are waiting for the day that one of them proposes.
She and Cheon Do-Yun have never actually met, but she has heard quite a bit from Shota about his little brother. Mostly the more embarrassing stories.