Seo Rika
瀬尾 りか
| Seo Rika瀬尾 りか | |
| Hair | Antenna, Brown, Curtained, Parted in Middle, Ponytail, Spiky Bangs, Waist Length+ |
| Eyes | Violet |
| Body | Pale, Slim, Teen |
| Clothes | Miniskirt, Sailor School Uniform, School Uniform, Shorts, Tank Top, Thigh-high Stockings, Unusual Hair Ornaments |
| Role | Full Sister, High School Student, Non-blood-related Daughter, Older Sister |
| Visual novels | Main character - Anekan ~Onee-chan Kansatsu Nikki~ |
| Voiced by | Nashimoto Yuuri |