Yeah the fazbear frights books have some weird lore. A ball pit can take you back in time to be killed by a rabbit with an unhinging jaw, dogs can text you, plushtrap is human and gets run over by a train (that was an epic death), and some endoskeleton powered by agony who could possibly be ennard (I say that because he collects scraps that he could probably attach to his body, and he wears a white mask).