Yoo Shi Ah 유시아 Born 17 September 1995 Better Known By Her Stage Name YooA 유아 South Korean Idol Signed To WM Entertainment. She Debuted In 2015 As A Member Of South Korean Girl Group Oh My Girl Under WM Entertainment. YooA Officially Made Her Debut As A Solo Artist In September 2020 With Her First Extended Play Bon Voyage Bon Voyage /Bon Voyage .