Son Ju-yeon (Hangul: 손주연), better known as Eunseo[1] (은서), was born on May 27, 1998 (age 22) in Incheon, South Korea. She is the sub-vocalist[1] and sub-dancer[citation needed] of the South Korean-Chinese girl group Cosmic Girls and is a member of its Joy Unit.


Eunseo was a former trainee of Pledis Entertainment after being one of the finalists at Happy Pledis 2011. She later left and became a trainee under Starship Entertainment for three years.

Before debut, she appeared in MONSTA X's music video for "Rush".[7]

She was revealed as a member of Cosmic Girls on December 17, 2015 and proceeded to debut with the group as a sub-vocalist and sub-dancer on February 25, 2016 with the release of their mini-album Would You Like? and the single "MoMoMo". On December 21, 2015, she took part in a cover of Mariah Carey's "All I Want for Christmas Is You" along with SeolA, Bona, EXY, Dawon, Cheng Xiao, Mei Qi and Dayoung.[4][8][9]

She graduated from School of Performing Arts Seoul (SOPA) in 2017.


Music VideosEdit

Year Title Artist Role
2015 "Rush" MONSTA X Main[7]
"Happy new Year" UNIQ Main[citation needed]
2016 "Whatever" Yu Seung Woo Main[1]

Variety ShowsEdit

Year Title Network Notes
2016 Running Man SBS [citation needed]
2018 Real Men 300 MBC [10][11]


Year Title Role Notes
2018 Life Book Room Won Se-mi [citation needed]

Official LinksEdit


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Eunseo's "MoMoMo" profile.
  2. 2.0 2.1 2.2 Profiles on the Official Website.
  3. Eunseo's Weekly Idol Profile. cr. kimbully0819 Retrieved January 23, 2018.
  4. 4.0 4.1 Joy Unit Reveal Teaser Retrieved September 9, 2018.
  5. Dream Your Dream φορεύς Unit teaser.
  6. αγύρτης unit point dance Retrieved October 12, 2018.
  7. 7.0 7.1 MONSTA X "Rush". Retrieved November 24, 2018.
  8. Cosmic Girls makes long-awaited debut. Yonhap Retrieved October 29, 2018.
  9. "All I Want for Christmas Is You" Cover. Retrieved October 28, 2018.
  10. "Real Men 300" (2018 TV Show): Cast & Summary. Kpopmap Retrieved September 27, 2018.
  11. Real Men 300" Adds NCT Lucas, VIXX Ravi, WJSN Eunseo & More to the Cast. Kpopmap Retrieved September 27, 2018.
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