Im Yeo-jin (Hangul: 임여진; born on November 11, 2002, in Suseong District, Daegu, South Korea) known mononymously as YeoJin (Hangul: 여진)[4] is a South Korean singer. She is the fourth revealed member of LOONA. She is also a member of Loossemble. She debuted on January 4, 2017 as a member of LOONA and subsequently released her solo single album "YeoJin" on January 16, 2017. On June 8, 2025, she solo debuted with the single "Dancing in the dark".