Cosmic Girls, also known as WJSN, is a South Korean-Chinese girl group formed by Starship Entertainment and Yuehua Entertainment which debuted in 2016.

Stage Name: EXY/엑시
Real Name: Chu Sojung/추소정
Birthday: November 6, 1995
Birthplace: Busan, South Korea
Blood Type: A
Height: 166 cm
Position in Group: Leader, Main Rapper, Lead Dancer, Vocalist
Unit: Sweet
Representative Star Sign: Scorpio
Birth Flower: Eupatorium Japonicum (hesitant)
Languages: Korean
Siblings: one older sister, one younger brother

Stage Name: SeolA/설아/Xue E/雪娥
Real Name: Kim Hyunjung/김현정
Birthday: December 24, 1994
Birthplace: Seoul, South Korea
Blood Type: A
Height: 165 cm
Position in Group: Lead Vocalist, Lead Dancer
Unit: Sweet
Representative Star Sign: Sagittarius
Birth Flower: Viscum Album (strong patience)
Languages: Korean
Siblings: one older sister

Stage Name: Xuan Yi/선의
Real Name: Wu Xuan Yi/吴宣儀
Birthday: January 26, 1995
Birthplace: Hainan, China
Blood Type: O
Height: 166 cm
Position in Group: Lead Dancer, Vocalist
Unit: Joy
Representative Star Sign: Aquarius
Birth Flower: Humble Plant (shy)
Languages: Chinese, Korean
Siblings: one younger brother

Stage Name: Bona/보나/Bao Na/苞娜
Real Name: Kim Jiyeon/김지연
Birthday: August 19, 1995
Birthplace: Gwangyeoksi, Daegu, South Korea
Blood Type: A
Height: 163 cm
Position in Group: Lead Dancer, Lead Rapper, Vocalist, Visual
Unit: Wonder
Representative Star Sign: Leo
Birth Flower: Rose Campion (diligent in contrast to her prim looks)
Languages: Korean

Siblings: one older brother
Education: Dongduk University

Stage Name: Soobin/수빈/Xiu Bin/秀斌
Real Name: Park Soobin/박수빈
Birthday: September 14, 1996
Birthplace: Seoul, South Korea
Blood Type: AB
Height: 159 cm
Position in Group: Main Vocalist
Unit: Sweet
Representative Star Sign: Virgo
Birth Flower: Marmello (seduce)
Languages: Korean
Siblings: one younger brother

Stage Name: Luda/루다
Real Name: Lee Luda/이루다
Birthday: March 6, 1997
Birthplace: Seoul, South Korea
Blood Type: A
Height: 157 cm
Position in Group: Lead Rapper, Vocalist
Unit: Natural
Representative Star Sign: Pisces
Birth Flower: Daisy (cheerful)
Languages: Korean
Siblings: one older sister

Stage Name: Dawon/다원/Duo Yuan/多愿
Real Name: Nam Dawon/남다원
Birthday: April 16, 1997
Birthplace: Seoul, South Korea
Blood Type: A
Height: 167 cm
Position in Group: Main Vocalist
Unit: Natural
Representative Star Sign: Aries
Birth Flower: Tulip (beautiful eyes)
Languages: Korean
Siblings: one older brother

Stage Name: Eunseo/은서/En Xi/恩熙
Real Name: Son Juyeon/손주연
Birthday: May 27, 1998
Birthplace: Incheon, South Korea
Blood Type: B
Height: 168 cm
Position in Group: Lead Rapper, Lead Dancer, Vocalist
Unit: Joy
Representative Star Sign: Gemini
Birth Flower: Daisy (innocent heart)
Languages: Korean
Siblings: two older sisters
Education: Seoul School of Performing Arts

Stage Name: Cheng Xiao/성소
Real Name: Cheng Xiao Xiao/程瀟瀟
Birthday: July 15, 1998
Birthplace: Shenzhen, China
Blood Type: B
Height: 167 cm
Position in Group: Main Dancer, Vocalist, Face of the Group
Unit: Wonder
Representative Star Sign: Cancer
Birth Flower: Rose (lovely)
Languages: Chinese, Korean
Siblings: one younger sister
Education: Martial Arts School in Shenzhen; Xingchen Dance Academy; Seoul School of Performing Arts

Stage Name: Mei Qi/미기
Real Name: Meng Mei Qi/孟美岐
Birthday: October 15, 1998
Birthplace: Luoyang, China
Blood Type: B
Height: 164 cm
Position in Group: Main Dancer, Vocalist
Unit: Natural
Representative Star Sign: Libra
Birth Flower: Sweet Basil (good hope)
Languages: Chinese, Korean

Stage Name: Yeoreum/여름/Xia Tian/夏天
Real Name: Lee Jinsook/이진숙
Birthday: January 10, 1999
Birthplace: Seoul, South Korea
Blood Type: A
Height: 161 cm
Position in Group: Lead Rapper, Vocalist
Unit: Joy
Representative Star Sign: Capricorn
Birth Flower: Box Flower (patience)
Languages: Korean
Siblings: one younger brother

Stage Name: Dayoung/다영/Duo Rong/多榮
Real Name: Im Dayoung/임다영
Birthday: May 14, 1999
Birthplace: Jeju, South Korea
Blood Type: A
Height: 161 cm
Position in Group: Lead Vocalist
Unit: Wonder
Representative Star Sign: Taurus
Birth Flower: Columbine (an oath to victory)
Languages: Korean
Education: Seoul School of Performing Arts

Stage Name: Yeonjung/연정
Real Name: Yu Yeonjung/유연정
Birthday: August 3, 1999
Birthplace: Seoul, South Korea
Blood Type: A
Height: 167 cm
Weight: 52 kg
Position in Group: Main Vocalist, Center, Maknae
Representative Star Sign: Ophiuchus
Languages: Korean
Hobbies: playing alone
Siblings: one older brother
Former member of I.O.I (rank 11 in Produce 101)