| Origin | Seoul, South Korea |
| Debut | August 13, 2025 |
| Debut Album | Plot Twist |
| Number of Members | 7 |
| Members | Arin Michi Katelyn Bome Seohyeon Aurora Nahyun |
| Former Member | Sorin |
| Oldest Member | Arin |
| Youngest Member (Maknae) | Nahyun |
| Tallest Member | Michi |
| Shortest Member | Katelyn |
| Social Media | Instagram: @atheart.titan X: @atheart_titan TikTok: @atheart.titan Youtube: AtHeart_TITAN Weibo: @AtHeart_Official Douyin: AtHeart_Official BiliBili: AtHeart_TITAN Xiaohongshu: AtHeart_TITAN |
AtHeart Members Profile
Arin
| Full Name | Lee Arin |
| Birthday | July 01, 2007 |
| Birthplace | Wonju, South Korea |
| Age | 19 years and 2 months old |
| Height | 5 feet 4 inches (164 cm) |
| Zodiac Sign | Cancer |
| Chinese Zodiac Sign | Pig |
| MBTI | ISFJ |
| Nationality | Korean |
| Education | Hanlim Multi Arts School |
| Position | Leader, main dancer |
| @arinatheart |
Michi
| Full Name | Kim Misook |
| Birthday | May 06, 2007 |
| Birthplace | Honolulu, Hawaii |
| Age | 19 years and 3 months old |
| Height | 5 feet 8 inches (174 cm) |
| Zodiac Sign | Taurus |
| Chinese Zodiac Sign | Pig |
| MBTI | ENTJ |
| Nationality | Japanese-American |
| @michiatheart |
Katelyn
| Full Name | Katelyn Angela Ejercito Tan |
| Birthday | July 24, 2007 |
| Birthplace | Parañaque, Philippines |
| Age | 19 years and 1 month old |
| Height | 5 feet 3 inches (162 cm) |
| Zodiac Sign | Leo |
| Chinese Zodiac Sign | Pig |
| MBTI | INFJ |
| Nationality | Filipina |
| @katelynatheart |
Bome
| Full Name | Lee Bom |
| Birthday | November 26, 2007 |
| Birthplace | Geochang, South Korea |
| Age | 18 years and 9 months old |
| Height | 5 feet 5 inches (166 cm) |
| Zodiac Sign | Sagittarius |
| Chinese Zodiac Sign | Pig |
| MBTI | ISFJ |
| Nationality | Korean |
| Education | Hanlim Multi Arts School |
| Position | Main vocalist |
| @bomeatheart |
Seohyeon
| Full Name | Moon Seohyeon |
| Birthday | September 12, 2008 |
| Birthplace | Taean, South Korea |
| Age | 17 years and 11 months old |
| Height | 5 feet 3 inches (162 cm) |
| Zodiac Sign | Virgo |
| Chinese Zodiac Sign | Rat |
| MBTI | ISTP |
| Nationality | Korean |
| @seohyeonatheart |
Aurora
| Full Name | Nakai Aurora |
| Birthday | July 04, 2009 |
| Birthplace | Tokyo, Japan |
| Age | 17 years and 2 months old |
| Height | N/A |
| Zodiac Sign | Cancer |
| Chinese Zodiac Sign | Ox |
| MBTI | ENFP |
| Nationality | Japanese |
| @auroraatheart |
Nahyun
| Full Name | Kim Nahyun |
| Birthday | September 03, 2009 |
| Birthplace | Cheongju, South Korea |
| Age | 17 years old |
| Height | 5 feet 7 inches (172 cm) |
| Zodiac Sign | Virgo |
| Chinese Zodiac Sign | Ox |
| MBTI | ISTP |
| Nationality | Korean |
| Education | Hanlim Multi Arts School |
| Position | Maknae |
| @nahyunatheart |
Former Member Profile
Sorin
| Full Name | Jung So-rin |
| Birthday | July 09, 2007 |
| Birthplace | Sokcho, South Korea |
| Age | 19 years and 1 month old |
| Zodiac Sign | Cancer |
| Chinese Zodiac Sign | Pig |
| MBTI | ENTJ |
| Nationality | Korean |
Member Ages: Oldest to Youngest
| Member | Birthday | Age |
|---|---|---|
| Michi | May 06, 2007 | 19 years, 3 months, 30 days old |
| Arin | July 01, 2007 | 19 years, 2 months, 4 days old |
| Katelyn | July 24, 2007 | 19 years, 1 month, 12 days old |
| Bome | November 26, 2007 | 18 years, 9 months, 10 days old |
| Seohyeon | September 12, 2008 | 17 years, 11 months, 24 days old |
| Aurora | July 04, 2009 | 17 years, 2 months, 1 day old |
| Nahyun | September 03, 2009 | 17 years, 2 days old |
FAQs
How many members are in AtHeart?
AtHeart is a 7-member K-pop girl group. The group consists of Arin, Michi, Katelyn, Bome, Seohyeon, Aurora, and Nahyun.
When did AtHeart debut?
AtHeart debuted on August 13, 2025, with their album Plot Twist.
