Bit late on this one but in the words of a great writer:
"Don't trust the cannibal just because he's using a knife and fork."
Granny Weatherwax, written by Terry Pratchett
I don't think it's actually an angle the writers intended, but like all the half-baked ideas they've thrown out, it just raises too many questions, and those questions are far more interesting than helping catgirls make a sex temple.
For instance, here's a theory that springs to mind, what if Kiyoko is just a fake made from the wraith that ate her, and the entire Keros thing was a set-up from the beginning? Think about it, she was killed by a wraith, she just remembers waking up in the astral space which is her "gods" dream. The orb just happened to be in a ruin right outside a community of marauding wolf men and no-one found it before the champ who happens to have a very special soul?
-So not Keros killed Kiyoko and her people, ascended to godhood, years later hatches a plan to make Kinu (because prophecy, and super special wifu senses, and bad writing) and so plants the amulet along with a regurgitated version of Kiyoko for the champ to find. It would be why he acts so pissy if you throw her back in his face, and explains why she completes her transformation in full bitch once she's out of the orb and he has to finish the job of stitching her together from various things he's eaten.
All that, is a theory I pulled from my arse, because TOBS left the door wide open by not exploring any of these ideas properly, and they're far more fascinating for their implications then being a mute at a festival where everyone looks down on you.