Ryona is not a monolith but a spectrum of sub-fetishes. It generally includes:

The term "ryona" is a portmanteau of the Japanese words ry艒ki (bizarre/abnormal) and onnanoko (girl). In the context of gaming and digital art, it refers to a genre focused on the depiction of characters鈥攈istorically female, though the genre has diversified鈥攗ndergoing physical struggle, defeat, or various forms of duress within a gameplay or cinematic context.