Discover everything about Moon Sua, the talented rapper and vocalist of K-pop girl group Billlie. Biography, career highlights, and personal life.
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| Photo of Moon Sua (Billlie) – Rising Star of the K-pop World |
Who is Moon Sua?
Moon Sua (Korean: 문수아) is a South Korean rapper, singer, and performer, best known as a member of the girl group Billlie under Mystic Story Entertainment. Born on September 9, 1999 in Cheongju, South Korea, she is widely recognized not only for her powerful stage presence but also for being the younger sister of the late Moonbin from the boy group ASTRO.
Moon Sua (Billlie) – Full Biodata and Profile
Detailed biodata of Moon Sua from Billlie, including her real name, birth details, MBTI, hobbies, and more.
| Field | Information |
|---|---|
| Full Real Name | Moon Sua |
| Name in Hangul | 문수아 |
| Stage Name | Moon Sua |
| Date of Birth | September 9, 1999 |
| Place of Birth | Cheongju, North Chungcheong Province, South Korea |
| Occupation | Rapper, Singer, Idol |
| Gender | Female |
| Blood Type | O |
| Height | 164 cm (5’4″) |
| MBTI | ISFP |
| Nationality | South Korean |
| Education | Hanlim Multi Art School |
| Hobbies | Listening to music, writing lyrics, dancing |
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Early Life and Training
Moon Sua spent nearly a decade as a trainee under YG Entertainment, one of Korea’s “Big 3” agencies. She gained early fame as a standout contestant on the reality show Unpretty Rapstar 2 in 2015, where she finished as the third runner-up, showcasing her fierce rap skills and lyrical talent.
Debut with Billlie
In November 2021, Moon Sua officially debuted with Billlie, a dynamic K-pop girl group known for their unique storytelling and genre-blending music. Their debut mini-album, The Billage of Perception: Chapter One, featured the hit single “Ring X Ring”.
Roles and Contributions
In Billlie, Moon Sua takes on the role of main rapper and lead vocalist. Her deep voice, stage charisma, and versatility have made her a fan favorite both in South Korea and internationally.
Sub-Unit & Recent Activities
In April 2025, Moon Sua partnered with fellow member Siyoon to launch Billlie’s first sub-unit, Moon Sua X Siyoon. Their debut single, “Snap”, received praise for its edgy sound and stylish visuals, reaffirming her presence in the K-pop industry.
Personal Life and Hiatus
Moon Sua took a short break from activities in 2023 following the tragic passing of her brother, Moonbin. She returned in 2024, resuming her career with grace and strength, earning admiration from fans and peers alike.
Interesting & Fun Facts About Moon Sua (Billlie)
Explore fun and interesting facts about Moon Sua from the K-pop girl group Billlie. Discover her personality, talents, and career highlights.
- Moon Sua was born on September 9, 1999, in Cheongju, South Korea.
- She is the younger sister of the late Moonbin from ASTRO.
- She trained for almost 10 years under YG Entertainment before debuting with Billlie.
- She was a finalist on Unpretty Rapstar 2, showcasing her powerful rap skills.
- Moon Sua is known for her deep, charismatic voice and smooth rap flow.
- Her MBTI type is ISFP, often described as artistic and sensitive.
- She debuted with Billlie in November 2021 under Mystic Story.
- She helped write lyrics for several of Billlie’s songs.
- Moon Sua enjoys writing in journals and listening to R&B music.
- Her favorite color is purple, and it suits her mysterious vibe.
- She is admired for her emotional strength, especially after the passing of her brother Moonbin.
- She took a hiatus in 2023 and returned to group activities in 2024.
- She is one of the main rappers and lead vocalists in Billlie.
- Her stage presence is described as intense and captivating.
- She co-founded the sub-unit Moon Sua X Siyoon in 2025 with the single “Snap.”
- Moon Sua is known for her close bond with all Billlie members, especially Tsuki.
- She is a graduate of Hanlim Multi Art School, a common alma mater for many idols.
- She enjoys eating spicy food and considers tteokbokki her favorite snack.
- Moon Sua often surprises fans with her silly and playful personality off-stage.
Connect with Moon Sua
Stay updated with Moon Sua through her official Instagram account: @a_us_noom. She shares behind-the-scenes moments, fashion looks, and messages to fans.
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