Satan means adversary and it's the position nearest to "god" in Judaism. It's not a demon or devil. It's an angel appointed by God to test the faith of the faithful.

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You likely mean Helel, Samiel, Azazel, and all the other Fallen. I am not Jewish or Christian, but I study religion both from a historical and theological view point. As that's what's Occultists do. The devil as you think of it is little more than Christian fan fiction. It's not in the bible