This page only updates precious events about Ruka
Ruka profile
| stage name | RUKA |
| Korean name | 루카 |
| English name | RUKA |
| Chinese name | 河井瑠花 |
| nationality | Japan |
| gender | female |
| place of birth | Tsushima City, Nagasaki Prefecture, Japan |
| date of birth | March 20, 2002 |
| age | |
| Blood type | O |
| zodiac sign | Pisces |
| talent agency | YG Entertainment |
| idol group | BABYMONSTER |
| position in the group | Main Dancer, Main Rapper |