|Family|| Shin'ichirō Minato (adoptive brother)|
Soushi Asaka (adoptive brother)
Kano Kozuki (adoptive son)
Ryouya smiles often and loves children.
Ryouya grew up in an orphanage with his adoptive younger brothers, Shin'ichirō Minato and Soushi Asaka. Soon Ryouya left the orhanage and it was just Shinichirou and Soushi. During visitation, Ryouya would bring along presents when Shinchirou and Soushi were just children, but Shinichirou would get annoyed, wanting to play and spend time with Nanami instead.