Liu Xie-Ning (Chinese: 刘些宁) also known as "Ryu Sa-Jeo" (Hangul: 류사저) and as "Sally" (Hangul: 샐리) is a South Korean singer, dancer, actress and model under Jellyfish Entertainment. She debuted as a member of Gugudan in 2016. She is the Lead Rapper and Lead Dancer in Gugudan.