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 often seen wearing a dark coat over his clothes. He dons a large, round helmet with yellow horn-like features sticking from both sides. The Great Demon Lord's face has never been seen properly and the only visible features about him are his long, sharp, dark pink nails and long, dark green hair, the latter being a trait he would pass down to his two sons.

Personality
Despite being the menacing Demon Lord, he is very irresponsible, forgetful, and random. His personality often switches between a comical, yet menacing tyrant and a cheerful person, a trait other Demons have called 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 a molten lava bath while he was counting to a hundred, he repeatedly lost 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 Be'el was already there when one of his servants reminded him. When he gives Baby Be'el a summer vacation homework, he also forgets about it.