Great Demon Lord

The, or Beelzebub III, is a very random and forgetful king. He wants to destroy humanity and sends his youngest son, Beelzebub IV, to the human world to do the job for him. He decides later to send his older son, En, instead, forgetting that he has already sent his youngest son to do that. After he is reminded by his servants, he reassigns En to do the job with his little brother.

Appearance
The Great Demon King is seen wearing a helm with horns and a long cape. He also has green hair, which seems to be a trait that he has passed down to his sons.

Personality
He talks somewhat like the stereotypical teenager. He seems to randomly switch between a comedically menacing tyrant and a cheerful person, a trait other demons have said is "kinda annoying".