한 UDTT UDTT (우당탕탕 소녀단) is a South Korean Girl Group. They consist of 4 members: Risako, Han Chaehee, Koo Hanna and Kwon Yejin. Read All General Information International Stage Name : UDTT Domestic Stage Name : Pronounce 우당탕탕 소녀단 Members 202420252026 RisakoHan ChaeheeKoo HannaKwon YejinJung Sena Risako (리사코) Full Name: Arai Risako Date of Birth: 1997-06-07 (29 years) Zodiac sign: Gemini Country: Japan Active period: 2024-present Role: Leader,Vocal,Dancer Han Chaehee (한채희) Full Name: Han Chaehee Date of Birth: 2001-11-13 (24 years) Zodiac sign: Scorpio Country: South Korea Active period: 2024-present Role: Vocal Koo Hanna (구한나) Full Name: Koo Hyun Kyoung Date of Birth: 2004-01-20 (22 years) Zodiac sign: Aquarius Country: South Korea Active period: 2024-present Role: Vocal,Dancer Kwon Yejin (권예진) Full Name: Kwon Yejin Date of Birth: 2006-06-26 (20 years) Zodiac sign: Cancer Country: South Korea Active period: 2024-present Role: Vocal Past Members Jung Sena (정세나) Full Name: Jung Seung Ha Date of Birth: 2006-10-22 Zodiac sign: Libra Country: South Korea Active period: 2024-2025 Role: Vocal,Rapper,Maknae Metrics and Achievements Success(max 5 stars) : Time since last release : 17 Days (2026-08-22) Time to Success : Not reached or Indie/Nugu PAKs : 0 Music Show Awards2006+ : 0 Annual Awards : 0 Streaming Weekly Score(Since 2010) : Never ranked in top 100 Billboard weekly Score(Since 2020) : Never ranked in top 200 Physical Sales (Circlechart) : 0+ Total Youtube Views : 1.480.993+ Brand Physical Sales : 0+ Brand Views : 1.480.996+ Images No images yet