| Full Name | Moon Seo-yoon |
| Stage Name | Annie |
| Native Name | 문서윤 |
| Birthday | January 23, 2002 |
| Age | 23 years and 5 months old |
| Zodiac Sign | Aquarius |
| Birthplace | Hannam-dong, Yongsan-gu, Seoul, South Korea |
| Height | 5’6″ (168 cm) |
| Weight | – |
| Blood Type | – |
| MBTI | ESTJ |
| Education | Columbia University |
| Languages | Korean, English |
| Group | ALLDAY PROJECT |
| Social Media | Instagram: [@anniesymoon] |