Kim Minseo Hangul - 김민서 Birthday April 9th 1996 Is A Soloist Under Mystic Entertainment's Sublabel APOP. She Debuted On March 6th 2018 With The Single "The Grand Dreams". She Is In The Fictive 3 Member Girl Group "TEAPARTY" As Ria From The Kdrama "Imitation" 2021