Ok so I finally got all endings (the Bliss ending last) and im trying to type this as unspoilery as possible so it might be incomprehensive
But i have to say out of all the crackpot theories i had i never thought i'd be right about Blythes origins??? like... it was just a small obscure throwaway kinda thought i had while playing the first playthrough then i got the Bliss ending and i was like *shocked pikachu face*?
10/10 gonna end it here before i go off on a ramble