Board Thread:False Info and Speculative Discussion/@comment-27547895-20160203212624/@comment-5379216-20160204040719

HolyDrumstick wrote:

But we also did not know that chimeras existed prior to season five*, and had we been having a discussion about non-supernatural hybrid creatures created through science, last season, you could just as easily say that didn't make any sense. Not really. Artificially made hybrid creatures is something I thought about and wanted prior to season 5. It simply doesn't make sense for a Werewolf to naturally be part Oni considering the fact that Oni aren't shapeshifters. They just are what they are.

HolyDrumstick wrote: It's never made clear how Oni exist in Teen Wolf. We only know of ways they can be summoned.

And we don't know that hybrid cannot "naturally occur" by some means.

All we know is that we have never seen anything similar to them before. We know that Oni are demon warriors made of fireflies and darkness.

Note: The following isn't canon, as it has never been shown or explained in the show. In japaness mythology, fireflies are the spirits of fallen warriors. We can theorize that this is the case in the TW universe and is the reason why the Oni (demon warriors) are made of fireflies (spirits of fallen warriors).