Kim Eun-jae, also known by her stage name Ejae, is a South Korean and American singer-songwriter and record producer. She is known for her work with Red Velvet, Aespa, Twice, Nmixx, Le Sserafim, Kep1er, Billlie, Kard, and other South Korean artists. She is also known for providing the singing voice of the character Rumi in the 2025 film KPop Demon Hunters, as well as writing several of the songs on its soundtrack. "Golden", a song she recorded for the film, topped the Billboard Hot 100 as well as in several other countries.