UDTT Members Profile & Facts

UDTT (우당탕탕 소녀단) is a five-member Kpop girl group under SW Entertainment. The group members are Risako, Koo Hanna, Kwon Yejin, Jessica and Han Chaehee. They debuted on April 29, 2025, with the single album, School Rush.

UDTT Profile

UDTT Facts:

– UDDT’s full form is “U-Dang-Tan-Tan Girls”.
– They are label mates with 3piece.
– The group’s producer is Yoon Ilsang who created the girl groups Brown Eyed Girls & 3piece.

SOCIAL MEDIA HANDLES
Instagram: udtt._.official
Youtube:@udtt_official
Twitter: udtt_official
TikTok: @udtt_official
Facebook: udtt.official 

Streaming Platform Links
Spotify | Apple Music | Genie | Bugs | Melon

UDTT Members Profile

1. Risako

Risako Facts:

– Risako was the first member of UDTT to be revealed.
– She participated on the survival show Girls Planet 999 and was eliminated in episode 8.
– She was formerly under iMe KOREA (2022–2023) and Biscuit Entertainment (2021).
– She learned to play the piano.
– She likes to visit the Mangwon Market and draw in her spare time.
– She is good at dancing, Korean and vocal impersonation.
– Her Chinese Zodiac sign is Ox.
– Motto: “Never get tired of her attractive dancing, Arai Risako!”.

SOCIAL MEDIA HANDLES
Instagram: @arai_risako_67
YouTube: @arairisako3066

2. Koo Hanna

Koo Hanna Facts:

– Hanna participated on the show “My Teenage Girl” and was eliminated in episode 4.
– She was the second member of UDDT to be revealed.
– She has worked as a backup dancer for H.O.T for their 2019 concert.
– She took classes at STAGE631 academy and Flat9 Academy.
– She appeared in T-ara Jiyeon’s “Take a Hike” choreography video.
– Her Chinese zodiac sign is goat.
– She describes himself in the hashtags #refreshing, #smilingangel and #giantbaby.
– She formerly trained under BEATS Entertainment (2022-2023), PocketDol Studio (2021), Biscuit Entertainment (2021), and iMe KOREA (N/A).
– Motto: “My youth is blood, sweat and tears”.

SOCIAL MEDIA HANDLES
Instagram: @gusrudl

3. Kwon Yejin

Kwon Yejin Facts:

– Yejin was the third member to be revealed.
– She participated on the show Universe Ticket and was eliminated in episode 4. Her final rank was #72.
– She considers her cheek dimples as her charming point.
– She is nicknamed ‘Geuroppi.’
– Her Chinese zodiac sign is Dog.
– She doesn’t like and is afraid of bugs.

4. Han Chaehee

Han Chaehee Facts:

– Chaehee was introduced as the fifth member of UDTT.
– She was in the pre-debut group G.I.G.
– She has won many awards at cultural arts festivals.
– She also participated and won the 2016 Youth Dance Competition.

5. Jessica

Jessica Facts:

– She is from Beijing, China.
– She was revealed as a member in April 2025.
– She was in the girl group IS GIRL.
– She is close with Xinyu from tripleS and Duna from CSR.
– She participated on the show Chuang Asia Thailand and her final rank was 20th.
– She is a former predebut member of BEWAVE, I.MET.U (2024-2025) and E11iVYN (2025).
– Her favourite Kpop group is BLACKPINK.
– She likes pink colour.
– She considers BLACKPINK’s Jisoo as her role model.
– She trained for around seven years.
– She can play the piano, drums and guitar.
– Read more facts about Jessica

SOCIAL MEDIA HANDLES
Instagram: @luyuting217
TikTok: @luyuting217

Former Pre-debut Members:

6. Jung Sena

Jung Sena Facts:

– Sena was introduced as the fourth member of UDTT.
– She majored in Dance in school.
– She won the 2021 “Dance and Opera” award and the SAC Competition.

‘REALLY REALLY’ – Official MV: