|Family and Relatives||Tomaru Sawagoe (father/grandfather/great-grandfather/great-great-grandfather/great-great-great-grandfather/half-great-great-granduncle/lover)|
Risa Inou (mother/paternal half-sister/)
|Seiyuu||Sayaka Aoki (credited as Rumiko Sasa)|
- Her name Rika means "Logic of Fragrant" or "Fragrance of truth" while her surname Inou means "that one skill".
- Rika is the youngest character to get pregnant across the games, lower than Rin Sekihata and Kagura Inou.
- According to the 0verflow character adultery chart Rika has children with Tomaru and Kuu but the official continuity is still unknown.