These vixen humanoids originated from the Digital Dark Age( where dark aspects of the internet come haunting the real world including creepypasta, erotica ). Exact origins aren't quite clear other than some stories, one very particular
story tells of a human male & a renamon(turned female) having a love bonding affair, the narrator
(who seems like a classic karren who's only using him to benefit her wants which excludes enhancing the relationship they supposedly had) driven into tantrum like rage attempted to murder them. The Lovebirds seem however very fortunate
to escaped her envious wrath by jumping through a Pixel Gate , others tell of single, depressed tragic souls or just single men finding love for strange reasons. At the near end of the age especially when the gates are closed is when first see these
RenaSapien make an appearance