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.

  • OVERVIEW
  • LOONA 1/3
  • ODD EYE CIRCLE
  • LOONA yyxy

LOONA 1/3: OVERVIEW

LOONA 1/3 (Hangul: 이달의 소녀 1/3), stylized as LOOΠΔ 1/3, is the first sub-unit of the girl group LOONA. They debuted with members HeeJin, HyunJin, HaSeul and ViVi on March 12, 2017 on Inkigayo with their song "Love & Live".

01. Heejin (희진): born in October 2000. Introduced in October 2016. Her animal is a rabbit and her colour is bright pink.

02. Hyunjin (현진): born in November 2000. Introduced in November 2016. Her animal is a cat and her colour is yellow.

03. Haseul (하슬): born in August 1997. Introduced in December 2016. Her animal is a bird and her colour is green. She is the unit's leader as well as the entire group.

04. Yeojin (여진): born in November 2002. Introduced in January 2017. Her animal is a frog and her colour is orange. Represents the slash in 1/3.

05. ViVi (비비): born in December 1996. She is the only Chinese member. Introduced in February 2017, but her representing month is April, due to her single being released during that month. Her animal is a deer and her colour is pastel rose.