| Full Name | Kawai Ruka |
| Stage Name | Ruka |
| Native Name | æ²³äº•ç‘ èŠ± |
| Birthday | March 20, 2002 |
| Age | 23 years and 2 months old |
| Zodiac Sign | Pisces |
| Birthplace | Yamaguchi Prefecture, Japan |
| Height | 5’5″ (165 cm) |
| Weight | – |
| Blood Type | – |
| MBTI | ISTJ/ISFP |
| Education | – |
| Languages | English, Korean, Japanese |
| Group | BABYMONSTER |
| Social Media | Instagram: [@rukakawai] |