성별 : 여성 생일 : 키/몸무게 :
See-Wah Eun Se-Joon's twin sister who had heart transplant when she was young due to a weak heart. She was obsessed with her brother Se-Joon and he fell in love with her as well but when he rejected her she warms up to Gi-Hoon and becomes a more out-going person.
She sleeps with her brother when he reveals Gi-Hoon's secret, but it is shown later that See-Wah had feelings for Gi-Hoon