Ryona is not a monolith but a spectrum of sub-fetishes. It generally includes:
The term "ryona" is a portmanteau of the Japanese words ryōki (bizarre/abnormal) and onnanoko (girl). In the context of gaming and digital art, it refers to a genre focused on the depiction of characters—historically female, though the genre has diversified—undergoing physical struggle, defeat, or various forms of duress within a gameplay or cinematic context.