Hell, I don’t even think canonically he has any kind of official position. The Devil isn’t Hades. Hades has an official position - he’s Lord of the Underworld. He’s just as much a deity as any of the other Greek pantheon.
But the Devil? I imagine Hell as just a giant hole in the ground where God throws things he doesn’t like. As the oldest and most powerful being in Hell, the Devil ends up running the place by default, but it’s not a position of divinely-granted authority. He’s just as much a prisoner there as anyone else. The jail just has no guards, so the prisoners end up running things.
Hell, I don’t even think canonically he has any kind of official position. The Devil isn’t Hades. Hades has an official position - he’s Lord of the Underworld. He’s just as much a deity as any of the other Greek pantheon.
But the Devil? I imagine Hell as just a giant hole in the ground where God throws things he doesn’t like. As the oldest and most powerful being in Hell, the Devil ends up running the place by default, but it’s not a position of divinely-granted authority. He’s just as much a prisoner there as anyone else. The jail just has no guards, so the prisoners end up running things.
He doesn’t. Him being the ruler of Hell was first depicted in Paradise Lost.