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

Billlie Moon Sua

Everything You Need To Know About Billlie 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 Moon Sua Full Profile

Billlie 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 Moon Sua Fun Facts

  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 SinB, KARD’s Jiwoo, BLACKPINK’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 Moon Sua Pre Debut Future 2NE1, Unpretty Rapstar, Etc.

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.

Billlie Moon Sua Appearance in Mnet Unpretty Rapstar 2

The rap competition program broadcast on Mnet, Unpretty Rapstar 2 is a hot topic of conversation among netizens, especially when the contestants that come from rappers to K-Pop idols are getting ‘brave’ to express their rap lyrics.

A diss battle, or the event of sarcasm through rap lyrics, is also a highlight in this program. One of the contestants who is often being targeted is Moon Sua, the only YG Entertainment trainee participating in this program.

In the last few episodes, the youngest contestant of Unpretty Rapstar 2 was also the target of satire by other contestants because of the YG label attached to her. Some contestants think that YG Entertainment made it easy for her to enter Unpretty Rapstar 2.

This, of course, immediately reminds us of Show Me The Money contestants who once satirized YG Entertainment artists, such as WINNER’s Mino, and iKON’s Bobby and B.I. However, unlike Mino, Bobby, and B.I, YG Entertainment apparently made a different and quite surprising statement regarding Moon Sua’s status as a trainee at the agency.

In their statement, YG Entertainment actually stated that although Sua is now a trainee, they cannot confirm whether the 15-year-old trainee will actually debut. “Moon Sua won’t be debuting soon, and she can’t be compared to B.I, Bobby, or Mino who appeared in Show Me the Money,” YG Entertainment representative said.

“Moon Sua is just a trainee who may or may not debut as a YG artist just because of how hard she worked. Just because she is now a trainee at YG, doesn’t mean we will support her. Sua herself is well aware of this condition, that’s why she worked so hard in Unpretty Rapstar 2,” they continued.

YG Entertainment’s statement seemed to tell that being successful as a trainee does not mean that the trainee will debut as a YG Entertainment artist. Moon Sua previously revealed at the beginning of the Unpretty Rapstar 2 program that she had been a trainee at YG Entertainment for more than 5 years, and revealed the possibility that she was the longest-running trainee at the agency.

However, the confirmation given did not necessarily satisfy the netters. They were actually disappointed to hear the news because they thought that Sua had been a trainee for a long time and deemed it appropriate to debut as a member of the new YG girl group.

“Are you kidding me? Sua feels like she’s been there for 6 years and you’re telling her she still needs time?” netters said. “What? I’ve been waiting for it,” another disappointment stated through a comment. “The majority are new faces. Alright YG, we’re done,” said another netter.

Even though YG Entertainment did not give Moon Sua the opportunity to debut immediately after her participation in Unpretty Rapstar 2, she managed to prove that her talent could make her the youngest contestant to get ranked 3rd in the final episode.

Billlie Moon Sua Debut

In 2021, Moon Sua finally debuted as a member of a girl group called Billlie. Yoon Jong-shin’s agency, Mystic Story, was gearing up to debut their first girl group in November 2021. On October 12th, 2021, they revealed that the name of the group was Billlie. The new six-member girl group from Mystic Story has finally been officially introduced!

Billlie is be a six-member group consisting of Moon Sua, Kim Suhyeon, Haram, Fukutomi Tsuki, Siyoon, and Haruna. Some of them were previously trainees who had the opportunity to appear in Mnet’s Unpretty Rapstar 2, the hit web drama A-TEEN, etc.

Along with the announcement of their group name, Billlie also launched a number of new social media accounts previously named Mystic Rookies.

During their countdown to debut, the members of Billlie also released a dance video to the background of Ashnikko’s song “Slumber Party” (featuring Princess Nokia).

Billlie presented themselves as a strong group in both dance and performance. Billlie also caught the public’s attention with their collaboration with renowned choreographer Lia Kim who leads One Million Dance Studio.

Not only that, but Billlie also got the opportunity to promote in several music programs that were aired on television. On November 11th, 2021, Billlie held their debut stage on Mnet while bringing the “Ring X Ring” performance. As you can see from the focus fancam below, Billlie’s Moon Sua looks very charismatic and fierce with her short black hair showing off her abilities as the rapper of the group.

What do you think about Billlie’s Moon Sua’s debut era?

Well, that was all the information about Billlie’s Moon Sua: starting from her full profile, fun facts, to learning more about her pre-debut story, and finally debuting with the group. Let’s give a lot of love and support to her so that her career can shine even brighter in the future. If you like this article, please don’t forget to kindly share it on your social media and stay tuned for more interesting upcoming articles from Byeol Korea!