| Origin | Seoul, South Korea |
| Debut | April 29, 2025 |
| Number of Members | 5 |
| Members | Risako Han Chaehee Koo Hanna Lu Yuting Kwon Yejin |
| Former Member | Jung Sena |
| Oldest Member | Risako |
| Youngest Member (Maknae) | Kwon Yejin |
UDTT Members Profile
Risako
| Full Name | Arai Risako |
| Birthday | June 07, 1997 |
| Birthplace | N/A |
| Age | 29 years old |
| Height | 5 feet 3 inches (161 cm) |
| Zodiac Sign | Gemini |
| Chinese Zodiac Sign | Ox |
| MBTI | ENFJ |
| Position | Leader, Vocalist, Dancer |
| @arai_risako_67 |
Han Chaehee
| Full Name | Han Chae Hee |
| Birthday | November 13, 2001 |
| Birthplace | N/A |
| Age | 24 years and 7 months old |
| Height | 5 feet 6 inches (168 cm) |
| Weight | 103 lbs (47 kg) |
| Zodiac Sign | Scorpio |
| Chinese Zodiac Sign | Snake |
| Blood Type | A |
| MBTI | INFP |
| Position | Sub Vocalist |
Koo Hanna
| Full Name | Koo Hyun Kyoung |
| Birthday | January 20, 2004 |
| Birthplace | N/A |
| Age | 22 years and 5 months old |
| Height | N/A |
| Zodiac Sign | Aquarius |
| Chinese Zodiac Sign | Goat |
| Blood Type | A |
| MBTI | ESTJ & ISTJ |
| Education | STAGE631 academy, Flat9 Academy |
| Position | Main Vocalist, Dancer |
| @gusrudl |
Lu Yuting
| Full Name | Lu Yu Ting |
| Birthday | February 17, 2005 |
| Birthplace | Beijing, China |
| Age | 21 years and 4 months old |
| Height | 5 feet 8 inches (174 cm) |
| Zodiac Sign | Aquarius |
| Chinese Zodiac Sign | Rooster |
| MBTI | ENTJ |
| Education | Berklee College of Music |
| @luyuting217 |
Kwon Yejin
| Full Name | Kwon Ye Jin |
| Birthday | June 26, 2006 |
| Birthplace | N/A |
| Age | 20 years old |
| Height | N/A |
| Zodiac Sign | Cancer |
| Chinese Zodiac Sign | Dog |
| MBTI | ENTP |
| Education | Lila Art High School |
| Position | Sub Vocalist, Maknae |
Former Member Profile
Jung Sena
| Full Name | Jung Seung Ha |
| Birthday | October 22, 2006 |
| Birthplace | N/A |
| Age | 19 years and 8 months old |
| Height | N/A |
| Zodiac Sign | Libra |
| Chinese Zodiac Sign | Dog |
| MBTI | INFJ |
| Education | Hanlim Arts School |
| Position | Main Rapper, Sub Vocalist, Maknae |
Member Ages: Oldest to Youngest
| Member | Birthday | Age |
|---|---|---|
| Risako | June 07, 1997 | 29 years, 19 days old |
| Han Chaehee | November 13, 2001 | 24 years, 7 months, 13 days old |
| Koo Hanna | January 20, 2004 | 22 years, 5 months, 6 days old |
| Lu Yuting | February 17, 2005 | 21 years, 4 months, 9 days old |
| Kwon Yejin | June 26, 2006 | 20 years old |
FAQs
How many members are in UDTT?
UDTT is a 5-member K-pop girl group. The group consists of Risako, Han Chaehee, Koo Hanna, Lu Yuting, and Kwon Yejin.
When did UDTT debut?
UDTT debuted on April 29, 2025, with their single album School Rush.
