|Age||7 (Summer Radish Vacation!!)|
|Occupation||Magager of Summer Radish fourth shop (Summer Radish Vacation!! 2)|
|Family and Relatives||Tomaru Sawagoe (father/maternal grandfather/maternal great-grandfather [via Kagura]/maternal half-great-granduncle [via Moegi]/lover)|
Hajime Inou (mother/paternal half-sister)
|Seiyuu||Hina Usami (SRV1)|
Rio Inou is the daughter of Tomaru Sawagoe and Hajime Inou. As Hajime was very young and her body was not developed enough, she died during childbirth. Kagura, who at the time was also pregnant by Tomaru, gave to birth a daughter named Rina Inou on the same day. Kagura ended her relationship with Tomaru and raised Rio alongside Rina.
Summer Radish Vacation!!
During the day, their events appear in locations of Haramihama and at night. It's possible to find them in Kagura's room or in the Lobby. In some of Tomaru's nighttime events that occur in Kagura's room, they are playing with Tomaru and Shun interferes. These events will influence the ending: if few or none of these events were triggered and neither Kagura, Mai, nor Youko were taken away by Tomaru, she and Rina will be taken away by Tomaru in the ending.
After Summer Radish Vacation!!
Though she liked Shun and hated Tomaru, she, along with Rina, was taken away by him and was repeatedly raped by him after she had her first menstruation. She was impregnated by him and gave birth to a daughter named Risa, after which she resigned herself and became completely obedient to Tomaru.
Summer Radish Vacation!! 2
She is the manager of Summer Radish's fourth shop. She and her daughter became pregnant together and were hospitalized at the same time for childbirth. She appears only in a photo shown by Rika. There is also a variation photo of them in bondage too.
- Her given name Rio (理央) consists of "principle" (理) and "center" (央).
- Her surname may also reference Tadataka Inou, a cartographer known for completing the first map of Japan, OR Kanori Inou, an anthropologist known for his studies in Taiwanese Aborigines.