| Full Name | Naoi Rei |
| Stage Name | Rei |
| Native Name | 直井レイ |
| Birthday | February 3, 2004 |
| Age | 21 years and 2 months old |
| Zodiac Sign | Aquarius |
| Birthplace | Nagoya, Aichi Prefecture Japan |
| Height | 5’7″ (169 cm) |
| Weight | 105.8 lbs (48 kg) |
| Blood Type | A |
| MBTI | INFJ |
| Education | School of Performing Arts Seoul (SOPA) |
| Languages | Korean, Japanese, English |
| Group | IVE |
| Social Media | Instagram: [@reinyourheart] YouTube: [@followrei_shipdo] |