Satan was created after Lucifer got attacked and kidnapped by something called Void. Half of Lucifers' grace was torn out by the time he was rescued. That grace was corrupted and twisted to birth Satan who is a Wrathful, Manipulative, Petulant, Controlling, Snide, and Nihilistic being. He is not truly in charge, Satan is the servant of Void. Satan was locked in a separate pocket space than the leviathans. He has people who worship him. Many believe Lucifer and Satan are the same person.