For those of you who believe Satan is a real being/entity, who is Satan? Where did he/it/she/they come from? What is Satan's relationship to other beings/entities, including deities, Angels (if you believe in them) and human beings?
For those of you who view Satan more figuratively or metaphorically, and not as a real being/entity, what does Satan represent to you?
Satan is a title meaning adversary, which is most commonly associated with the Christian devil. The Christian devil is the ultimate perversion of that which goes against natural order/"God". The oldest positive understanding of this unnatural force was the Egyptian god Set. Set certainly seems to exist based on my understanding. I'm not sure where Set came from, I'm not sure Set knows where It came from. It's relationship to God/Horus is dualistic, each is what the other is not. All other gods, indeed all other things, come from a mix of Set and Horus.