Hell Dukes and Duchesses

Astaroth alone does not rule hell, his legions are a hierarchy, and at the top of that hierarchy are the Dukes and Duchesses of Hell. These leaders are often demons who have evolved into god-like beings with powers unimaginable by mortals. They divide their time between trying to spread their master's corruption and trying to steal each other's territory and power. They each lean one way or the other their master's scale of tyranny or anarchy, but generally not entirely one way or the other, which allows them to gather followers on either side of the argument.