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 seemed to always use a helmet with a pair of horns on its sides and has long green hair along with a black cape. He appears on screen taken from an angle behind him, rarely having his frontal view seen. In Episode 53, it can be seen that he keeps a long fringe that masks his face, hence keeping the mystery revolving how he looks like intact.

Personality
The great demon lord likes to go karaoke and hang out with other female demons. Apparently, he has forgotten about his wife, Iris. He is kind of stupid and like to do random stuffs. Also, he is forgetful.

Powers and Abilities
The Great Demon Lord has the power to create artificial demons like Tamapochi. It is currently unknown how he creates them.

Relationships
He is the father of Baby Beel who he send in his place (because of a Majhong Tournament) to destroy the human world.

Trivia

 * The Great Demon Lord is a talented painter as evidenced by the demon portrait.
 * It also hinted that Oga has a big issue with the demon lord for the troubles of serving him as Beel's contractor and having demons that try to kill him, which causes him in wishing to go the demon world and punch the demon lord.
 * The Great Demon Lord can be very forgetful.