LOONA, stylized as LOOΠΔ (Hangul: 이달의 소녀; lit. Girl of the Month) is a 12-member South Korean girl group under BlockBerryCreative, a subsidiary of Polaris Entertainment. The group has been garnering attention since September 2016 and is considered one of the most ambitious and large-scale projects in the history of K-Pop.

Each individual member released a single album up until the group's official debut. A new member was introduced each month. Prior to debuting, the members also promoted in sub-units, each with their own defined concept.

The links below display an overview of the sub-units and their respective members.

LOONA

LOONA 1/3

01. Heejin (희진)

02. Hyunjin (현진)

03. Haseul (하슬)

04. Yeojin (여진)

05. ViVi (비비)

ODD EYE CIRCLE

06. Kim Lip (김립)

07. Jinsoul (진솔)

08. Choerry (최리)

LOONA yyxy

09. Yves (이브)

10. Chuu (츄)

11. Go Won (고원)

12. Olivia Hye (올리비아혜)