was the translation of "fiend" of outer space rather than devil intentional? whatever it is, its indifference and apparent omniscience is highly reminiscent of yog-sothoth from the cthulhu mythos, where people are also frequently driven insane by too much knowledge.
perhaps the devil of the dark and the puppet devil, with their goat-like appearances and puppet "children" were similiarly inspired by shub-niggurath.