Billlie’s Moon Sua: Full Profile, Fun Facts, Ex-YG Trainee, Etc.

billllie's Moon Sua

Everything You Need To Know About Billlie’s Main Rapper Moon Sua

Billlie (Hangul: 빌리) is a South Korean girl group that debuted under Mystic Story Entertainment on November 19th, 2021, with their first single titled “Ring X Ring”. Billlie has 7 members in the original line-up including Moon Sua, Suhyeon, Haram, Tsuki, Siyoon, Haruna, and Sheon.

In this article, we invite you to get up close and personal with one of the Billlie members who is also a popular former trainee of YG Entertainment. Can you guess who we are going to talk about? If not, scroll down to find out more about Billlie’s Moon Sua, starting from her full profile, fun facts, pre-debut story, to her story with the group, in the article below.

Billlie’s Moon Sua’s Full Profile

billllie's Moon Sua

Real Name: Moon Sua (Hangul: 문수아)

Stage Name: Moon Sua (Hangul: 문수아)

Place and Date of Birth: Chung-cheongbuk-do, Cheongju, South Korea, September 9th, 1999

Star Sign: Virgo

Height: 164 cm (5’4″)

Weight: 45 kg (99 lbs)

Blood Type: B

Position in the group: Main Rapper, Lead Vocalist

Nationality: Korean

Brother: Moon Bin (ASTRO)


  • Seowon Middle School (Graduation)
  • Shinbong High School (Transfer)
  • Hanlim Performing Arts High School (Department of Applied Music/Graduation)

Official Site: Instagram (a_us_noom)

Billlie’s Moon Sua Fun Facts

billllie's Moon Sua
  1. Billlie’s Moon Sua is the younger sister of ASTRO‘s Moonbin
  2. Billlie’s Moon Sua is a former YG Entertainment trainee
  3. Billlie’s Moon Sua was a YG trainee for 10 years before leaving in 2019
  4. Billlie’s Moon Sua was a contestant of Unpretty Rapstar 2
  5. Billlie’s Moon Sua is trained to be a rapper
  6. Billlie’s Moon Sua was a member of Future 2NE1 under YG Entertainment, but the debut plans were canceled
  7. Billlie’s Moon Sua was a student of Vocal Studio ONCE
  8. Billlie’s Moon Sua is considered a social butterfly as she is personally close with many female celebrities, such as Heize, Truedy, FIESTAR’s Yezi, GFRIEND’s SinBKARD’s JiwooBLACKPINK’s Jisoo, 4Minute’s Jiyoon, Hello Venus’s Yeoreum, Akdong Musician’s Suhyun, and actress Kim Sae-ron
  9. Billlie’s Moon Sua’s nicknames are mood maker and su-mile (smile)
  10. Billlie’s Moon Sua’s roles in the team are the main rapper, lead vocalist, cleaning, and mom
  11. Billlie’s Moon Sua’s hobbies are taking pictures and watching Netflix
  12. Billlie’s Moon Sua’s role model is CL
  13. Billlie’s Moon Sua’s motto is “there’s a time for everything”
  14. Billlie’s Moon Sua’s song she sang for her audition is “Only Wanna Give It To You” by Elle Varner
  15. Billlie’s Moon Sua’s charms are her Indian dimples
  16. Billlie’s Moon Sua would like to live like Suhyeon for a day because she wants to have schedules and plans
  17. Billlie’s Moon Sua has done craft accessories for her herself and her friends
  18. Billlie’s Moon Sua was an ulzzang with her brother
  19. Billlie’s Moon Sua produced a title track for MIXNINE “Come Over”
  20. Billlie’s Moon Sua appeared in Bigbang’s “Knock Out”
  21. Billlie’s Moon Sua loves retro and loves to wear clothes in that style
  22. Billlie’s Moon Sua used to play the violin when she was a child
  23. Billlie’s Moon Sua supports the LGBT+ community
  24. Billlie’s Moon Sua’s MBTI is ISFP
  25. Billlie’s Moon Sua likes meat and does not eat fruit
  26. Billlie’s Moon Sua’s role model is said to be Euaerin, a former member of Nine Muses, because she said that she wants to have the powerful rapping and sophisticated sensuality of her seniors
  27. Billlie’s Moon Sua said she wants to break the habit of biting her nails
  28. Billlie’s Moon Sua has the same birthday as Oh My Girl’s Binnie and TREASURE’s Junkyu
  29. Billlie’s Moon Sua is afraid of ghosts

Billlie’s Moon Sua Pre Debut: “Future 2NE1”, Unpretty Rapstar, Etc.

billllie's Moon Sua

During her pre-debut era, Moon Sua appeared in the YG Entertainment video titled “Future 2NE1” in 2012 and participated in Mnet’s Unpretty Rapstar 2 as a trainee at the time under YG Entertainment.

There were rumors that she moved to Fantagio after breaking up with YG in 2016, but it was confirmed that she was still with YG Entertainment by appearing in the Netflix sitcom YG Electronics in October 2018. In March 2019, YG officials mentioned through social media that Moon Sua was still signed in the same agency.

However, in May of the same year, it became clear that she had left YG Entertainment as all Future 2NE1 members, including Moon Sua, started having their own Instagram accounts.

In November 2019, her name appeared on her Mystic trainee schedule. She also appeared in a busking that was held on November 20th, 2019, a day after the schedule was revealed. Someone also said that she worked part-time at a tea shop.