| Full Name | Choi Ji-su |
| Stage Name | Lia |
| Native Name | 최지수 |
| Birthday | July 21, 2000 |
| Age | 24 years and 10 months old |
| Zodiac Sign | Cancer |
| Birthplace | Incheon, South Korea |
| Height | 5’4″ (162 cm) |
| Weight | 99.2 lbs (45 kg) |
| Blood Type | AB |
| MBTI | ENFJ |
| Education | Seoul’s School of Performing Arts |
| Languages | Korean, English, Japanese |
| Group | ITZY |
| Social Media | Instagram: [@lia_loves___] |