Jeon Hee-Jin Hangul 전희진 Mononymously Known As HeeJin Hangul 희진 Is A South Korean Singer Under MODHAUS. She Was The First Revealed Member Of Girl Group LOONA Hangul 이달의 소녀 Under BlockBerry Creative And Is A Member Of Its First Sub-Unit LOOΠΔ 1/3. She Is Currently A Member Of Girl Group ARTMS. She Debuted As A LOONA Member On October 5 2016 With The Solo Single Album HeeJin. On October 31 2023 She Made Her Official Solo Debut With Her First Mini Album Featuring The Title Track "Algorithm".