Great Demon Lord

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

Appearance
The Great Demon Lord is seen wearing a helmet 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
Although he is the menacing Demon Lord, he is very irresponsible and often says he will "do it another day". He seems to randomly switch between a comedically menacing tyrant and a cheerful person, a trait other demons have said is "kinda annoying". Furuichi and Oga have often said that he is strange, crazy and not serious in his job. He is also quite forgetful. For example, when he took Baby Beel to the molten lava bath and counting he was counting to a hundred, he repeatedly lose track of which number he was on, even for a short while. Also, he forgot that he had already sent Beelzebub and Hilda to destroy humanity and he sent En too; he only remembered Beel was already there when one of his servants reminded him. When he gives Baby Beel a summer vacation homework, he also forgets about it.