LOONA (Hangul: 이달의 소녀, Idalui Sonyeo), stylized as LOOΠΔ, is a South Korean girl group originally formed by BlockBerryCreative. The group is composed of 12 members: HeeJin, HyunJin, HaSeul, YeoJin, ViVi, Kim Lip, JinSoul, Choerry, Yves, Chuu, Go Won, and HyeJu (formerly Olivia Hye); and three sub-units: LOOΠΔ 1/3, ODD EYE CIRCLE, and yyxy.