Kotohara Rua
琴原 留亜
| Kotohara Rua琴原 留亜 | |
| Hair | Parted in Middle, Sidehair, Straight, Twin Tails, Waist Length+, White |
| Eyes | Violet |
| Body | Flat Chest, Kid, Pale, Slim |
| Clothes | Apron, Choker, Clothing with Ribbons, Dress Shoes, Hoodie, Miniskirt, Pajamas, Pantyhose, School Uniform, Thigh-high Stockings, Unusual Hair Ornaments |
| Items | Book |
| Personality | Antisocial, Nature Lover, Smart, Stoic |
| Role | Classmate, High School Student, Kouhai |
| Visual novels | Main character - Faint Tone |
| Voiced by | Hanafusa Mirai |