Kouno Rinka
河野 凛花
| Kouno Rinka河野 凛花O | |
| Measurements | Height: 172cm, Bust-Waist-Hips: 81-58-82cm, C cup |
| Birthday | 16 May |
| Hair | Black |
| Eyes | Black |
| Body | Young-adult |
| Clothes | Necktie, Suit |
| Role | Non-blood-related Sister, Teacher |
| Visual novels | Main character - Mamasen |
| Voiced by | Momoya Minami |