Loona 1/3 is a sub-unit of Loona. The sub-unit consists of 4 members: Haseul, ViVi, Heejin and Hyunjin. They debuted with the song "Love&Live".

Stage Name: Haseul / 하슬
Real Name: Jo Ha-seul / 조하슬
Birthday: August 18, 1997
Birthplace: Ansan, Gyeonggi Province, South Korea
Blood Type: O
Height: 162 cm
Position in group: Leader, Main Vocalist
Languages: Korean, English
Instruments: guitar, piano
Hobbies: singing
Siblings: one younger brother
Introduced in December 2016

She is represented by a bird

Her designed color is green

Debut solo song: Let Me In

Stage Name: Vivi / 비비
Real Name: Wong Gaahei / 黃珈熙

English Name: Viian Wong

Korean Name: Hwang A-ra / 황아라

Nickname: BB Cream
Birthday: December 9, 1996
Birthplace: Hong Kong
Blood Type: B
Height: 160 cm

Weight: 42 kg
Position in group: Lead Dancer, Vocalist, Visual
Languages: Chinese, Korean

Siblings: one younger sister and one younger brother
Introduced in April 2017

She is represented by a deer

Her designed color is pastel rose

Debut solo song: Everyday I Love You

Stage Name: Heejin / 희진
Real Name: Jeon Hee-jin / 전희진

Nickname: Heekkie

Birthday: October 19, 2000
Birthplace: Bundang-gu, Seongnam, Gyeonggi Province, South Korea
Blood Type: A
Height: 164 cm

Position in group: Main Dancer, Lead Vocalist
Languages: Korean, Japanese

Siblings: 2 older sisters

Instruments: guitar

Introduced in October 2016

She is represented by a rabbit

Her designed color is pink

Debut solo song: ViviD

Stage Name: Hyunjin / 현진
Real Name: Kim Hyun-jin / 김현진
Nickname: Hyunjin-bot

Birthday: November 15, 2000
Birthplace: Jeonju, North Jeolla Province, South Korea
Blood Type: AB
Height: 163 cm

Position in group: Lead Dancer, Vocalist, Visual, Maknae
Languages: Korean

Siblings: 2 older brothers

Instruments: piano

Introduced in November 2016

She is represented by a cat

Her designed color is yellow

Debut solo song: Around You