Esther Nara Yoon (born November 7, 1987),[1] better known by her stage name Esna (Korean: 에스나, stylized as eSNa), is a Korean-American singer-songwriter active in South Korea. Her first extended play, eSNa The Singer, was released in October 2015. She has also written songs for other artists, including the 2014 hit single "Some".