| Full Name | Yoo Si-ah |
| Stage Name | YooA |
| Native Name | ìœ ì‹œì•„ |
| Birthday | September 17, 1995 |
| Age | 29 years and 9 months old |
| Zodiac Sign | Virgo |
| Birthplace | Seoul, South Korea |
| Height | 5’3″ (159 cm) |
| Weight | 97 lbs (44 kg) |
| Blood Type | A |
| MBTI | INFP |
| Education | Sejong University |
| Languages | Korean, English, Japanese |
| Groups | OH MY GIRL (2015-present) Girls Next Door (2017) Sunny Girls (2016) |
| Social Media | Instagram: [@yoo__sha] |