Suou Aka
周防 紅伽
| Suou Aka周防 紅伽 | |
| Aliases | Aka-chan |
| Hair | Red, Shoulder-length, Side Tail, Wavy |
| Eyes | Violet |
| Clothes | Crop Top, Micro Bikini, Microskirt, Rubber Band With Beads, Thigh-high Stockings |
| Personality | Brother Complex, Deredere, Protective, Watashi |
| Role | Full Sister, Younger Sister |
| Visual novels | Side character - Shigokare ~Ecchi na Joshi Daisei to Doki x2 Love Lesson!!~ |
| Voiced by | Yahiro Mami |