YooA
유아 · 유시아 (Yoo Si-ah) · previously Yoo Yeon-joo
Yoo Si-ah (born Yoo Yeon-joo) — Main Dancer · Lead Vocalist · Face of the Group
September 17, 1995 South Korean 161 cm 44 kg Type A Virgo
YooA is the main dancer, lead vocalist, and face of Oh My Girl, the WM Entertainment girl group behind hits like "Nonstop" and "Dun Dun Dance." Born Yoo Yeon-joo on September 17, 1995, in Seoul, she later legally changed her name to Yoo Si-ah and debuted with Oh My Girl on April 20, 2015. Known for her doll-like visuals and razor-sharp choreography, YooA quickly became one of the group's central performers, later expanding her range through Mnet's Hit the Stage, the project group Sunny Girls, and the temporary unit Girls Next Door. In 2020, she made history as the first Oh My Girl member to debut solo, releasing the EP Bon Voyage and its ethereal title track produced by Grammy-nominated producer Josh Cumbee, before following up with a second EP, Selfish, in 2022. Off stage, YooA is known for a calm, independent personality — she enjoys spending time alone and listening to music, and she is often described by fans and members alike as looking younger and more delicate than she actually appears on camera. This profile gathers YooA's biography, group and solo discography, awards, and fan-favorite trivia into one place, making it an essential resource for fans researching Oh My Girl YooA's profile and career.
Story
Biography
Who Is YooA of Oh My Girl?
YooA is the main dancer, lead vocalist, and widely dubbed “face of the group” for Oh My Girl, WM Entertainment’s dreamy, fairy-tale-concept girl group. Born Yoo Yeon-joo on September 17, 1995 — later legally changed to Yoo Si-ah — she has become one of the most recognizable dancers in K-pop, admired for her doll-like visuals and precise, powerful choreography.
Early Life and Pre-Debut Activities
YooA was born in Sinchang-dong, Yongsan-gu, Seoul. Her older brother works as a professional choreographer at the acclaimed 1MILLION Dance Studio, and dance clearly runs in the family. Before debut, she trained under Hongyoungjoo dance academy and briefly at WH Entertainment before joining WM Entertainment and debuting with Oh My Girl on April 20, 2015.
Life in Oh My Girl and Pre-Solo Projects
As Oh My Girl’s main dancer, YooA anchors nearly every one of the group’s iconic choreographies, from “Closer” to “Dun Dun Dance.” In 2016 she competed on Mnet’s dance competition Hit the Stage and joined the Inkigayo project group Sunny Girls alongside members of GFriend, WJSN, Gugudan, and Momoland for the single “Taxi.” In 2017, she formed the temporary group Girls Next Door on Idol Drama Operation Team, releasing “Deep Blue Eyes.”
Solo Career
YooA released her debut solo single “Morning Call” in May 2018, followed by her first solo EP, Bon Voyage, on September 7, 2020 — becoming the first Oh My Girl member to go solo. The title track, produced by Grammy-nominated producer Josh Cumbee, embraced an ethereal, nature-inspired concept that suited her image perfectly and earned her first-ever solo music show win. She followed it with a second EP, Selfish, in late 2022, further establishing her as a distinctive solo artist within the group.
Profile
Basic Information
| Stage Name | YooA |
| Full Birth Name | Yoo Si-ah (유시아), born Yoo Yeon-joo (유연주) |
| Date of Birth | September 17, 1995 |
| Birthplace | Sinchang-dong, Yongsan-gu, Seoul, South Korea |
| Hometown | Seoul, South Korea |
| Nationality | South Korean |
| Height | 161 cm (5'3") |
| Weight | 44 kg (97 lbs) |
| Blood Type | A |
| Zodiac Sign | Virgo |
| MBTI | N/A |
| Education | N/A |
| Agency | WM Entertainment |
| Debut | April 20, 2015 |
| Languages | Korean |
| Nicknames | N/A |
| Hobbies | Being alone, listening to music |
| Favorite Color | Red |
| Ideal Type | N/A |
Membership
Groups & Positions
Oh My Girl
WM Entertainment
Main Dancer Lead Vocalist Face of the Group
April 2015 – Present
The Lineup
Group Members — Oh My Girl
Hyojung
Leader · Main Vocalist
Mimi
Main Rapper · Main Dancer · Sub Vocalist
YooA
Main Dancer · Lead Vocalist · Face of the Group
This Idol
Seunghee
Main Vocalist · Lead Dancer
Yubin
Sub Vocalist
Arin
Maknae · Lead Vocalist · Lead Dancer
Journey
Career Timeline
2014
Became a Trainee
Trained at WH Entertainment and the Hongyoungjoo dance academy before joining WM Entertainment.
2015
Debuted with Oh My Girl
Debuted as main dancer and lead vocalist on April 20, 2015, with the group's first mini album.
2016
Competed on Hit the Stage
Took part in Mnet's dance competition show, partnered with Block B's U-Kwon.
2016
Joined Sunny Girls project group
Formed the Inkigayo project group Sunny Girls and released the single "Taxi."
2017
Formed Girls Next Door
Formed a temporary project group on Idol Drama Operation Team and released "Deep Blue Eyes."
2018
Morning Call Solo Single
Released her debut solo digital single "Morning Call."
2020
Solo Debut with Bon Voyage
Became the first Oh My Girl member to debut solo, releasing the EP Bon Voyage on September 7, 2020.
2022
Released Selfish EP
Followed up her solo debut with a second mini album, Selfish, expanding her solo discography.
Music
Discography
🎵
Morning Call
Digital Single
2018
🎵
Bon Voyage
EP
2020
🎵
Selfish
EP
2022
💜
Oh My Girl
EP
2015
💜
Closer
EP
2015
💜
Pink Ocean
EP
2016
💜
Windy Day
Reissue
2016
💜
Listen to My Word
Single Album
2016
💜
Coloring Book
EP
2017
💜
Secret Garden
EP
2018
💜
Remember Me
EP
2018
💜
The Fifth Season
Studio Album
2019
💜
Fall in Love
Reissue
2019
💜
Nonstop
EP
2020
💜
Dear OhMyGirl
EP
2021
💜
Real Love
Studio Album
2022
💜
Golden Hourglass
EP
2023
💜
Dreamy Resonance
EP
2024
🎧
Cupid
Lead Single
2015
🎧
Closer
Lead Single
2015
🎧
Liar Liar
Lead Single
2016
🎧
Windy Day
Lead Single
2016
🎧
Listen to My Word (A-ing)
Lead Single
2016
🎧
Coloring Book
Lead Single
2017
🎧
Secret Garden
Lead Single
2018
🎧
Remember Me
Lead Single
2018
🎧
The Fifth Season (SSFWL)
Lead Single
2019
🎧
Bungee (Fall in Love)
Lead Single
2019
🎧
Nonstop
Lead Single
2020
🎧
Dun Dun Dance
Lead Single
2021
🎧
Real Love
Lead Single
2022
🎧
Summer Comes
Lead Single
2023
🎧
Classified
Lead Single
2024
🎧
Oh My
Non-Album Single
2025
Recognition
Awards & Achievements
Top 10 Artist (with Oh My Girl)
Melon Music Awards
2020
Female Idol of the Year (with Oh My Girl)
Brand of the Year Awards
2021
Digital Bonsang – "Nonstop" (with Oh My Girl)
Golden Disc Awards
2021
Song of the Year (April) – "Nonstop" (with Oh My Girl)
Gaon Chart Music Awards
2021
Artist of the Year (Bonsang) (with Oh My Girl)
The Fact Music Awards
2021
Bonsang Award (with Oh My Girl)
Seoul Music Awards
2021
Digital Song Bonsang – "Dun Dun Dance" (with Oh My Girl)
Golden Disc Awards
2022
Hot Performance of the Year (with Oh My Girl)
Gaon Chart Music Awards
2022
K-Global Heart Dream Bonsang (with Oh My Girl)
K-Global Heart Dream Awards
2022
Bonsang Award (with Oh My Girl)
Seoul Music Awards
2022
First-ever solo music show win – "Bon Voyage"
The Show
2020
Did You Know?
Trivia & Fun Facts ✨
★
Her birth name is Yoo Yeon-joo, and she later legally changed it to Yoo Si-ah.
★
She was born in Sinchang-dong, Yongsan-gu, Seoul, South Korea.
★
Her older brother, Junsun, is a professional choreographer at the renowned 1MILLION Dance Studio.
★
She trained at the Hongyoungjoo dance academy before joining an agency.
★
She was previously a trainee at WH Entertainment before moving to WM Entertainment.
★
She is known for her small, doll-like face, which the other members often tease her about.
★
Members and fans alike say her limbs look longer than her actual height suggests.
★
She was the first Oh My Girl member to film a commercial solo, appearing with B1A4's Baro.
★
Her favorite color is red.
★
Her favorite Oh My Girl song is reportedly "Closer."
★
She competed on Mnet's dance competition show Hit the Stage in 2016, partnered with Block B's U-Kwon.
★
She joined the Inkigayo project group Sunny Girls in 2016 alongside idols from GFriend, WJSN, Gugudan, and Momoland.
★
She formed the temporary group Girls Next Door on Idol Drama Operation Team in 2017.
★
She acted on the reality drama program Idol Drama Operation Team.
★
She released her debut solo single, "Morning Call," in May 2018.
★
She became the first Oh My Girl member to debut as a solo artist, with the EP Bon Voyage in September 2020.
★
Her solo debut title track "Bon Voyage" was produced by Grammy-nominated producer Josh Cumbee.
★
She earned her first-ever solo music show win with "Bon Voyage" on The Show.
★
She released a second solo EP, Selfish, in late 2022.
★
Her hobbies include spending time alone and listening to music.
★
She currently lives with her parents rather than in the group's shared dorm.
★
Her motto is reportedly to live simply and have fun.
★
She has said the moment she treasures most in a day is realizing she can sleep a little longer after waking up.
★
She is often praised as the group's visual and is nicknamed the "face of the group."
★
She featured with Hyojung and Jiho on a track for the Kart Rider x Line Friends OST.
★
She has professional representation through Saram Entertainment for individual acting and modeling work.
★
Her Instagram handle references her legal name, Si-ah.
★
She has described herself as someone who values quiet, low-key downtime between busy promotion schedules.
The Fandom
Fan Club & Fan Name 💜
Official Fan Name
Miracle
Miracle is the official fan name of Oh My Girl. The word reflects how WM Entertainment and the members view their bond with fans as something rare and precious, born from years of steady, against-the-odds growth before the group's mainstream breakthrough.
Official Fan Color
Rosy Pink, Sky Blue & Warm Sand
Oh My Girl's official colors are Pantone 230C, Pantone 304C, and Pantone 461U — a soft pink, a pale sky blue, and a warm sandy beige. Together they echo the group's dreamy, fairy-tale concept and the gentle, whimsical mood of songs like "Closer" and "Secret Garden".
Official Light Stick
Dear My Stick (디어마이봉)
Oh My Girl's official lightstick pairs a clear, gem-like bulb with a pastel handle, designed to glow in the group's signature soft pastel tones during concerts and fan meetings.
Fan Community Platform
Weverse
Weverse is where Oh My Girl posts updates, live broadcasts, and membership-exclusive content, giving Miracle direct daily contact with the members.
Stay Connected
Social Media
Photos
Gallery 📷
