"He was a strange man. Although he had the difficult experience of being imprisoned, he didn't try and defy his father. He just kept on summoning demons and making them obey him." - Dantalion talking about King Solomon.
Dantalion, also known as Dantaylion or Dantalian, known as the Keeper of the Forbidden Library of Bibliotheca, is a powerful Great Arch-Duke of Hell, with thirty-six legions of demons under his command; he is the 71st of 72 spirits summoned by King Solomon.
He teaches all arts and sciences, and also declares the secret counsel of anyone, given that he knows the thoughts of all people and can change them at his will. He can also cause love and show the similitude of any person, show the same by means of a vision along with Scrying any part of the Earth, and let them be in any part of the world they will. He Helps one relate with others on an emotional level. Teaches emotional intelligence and heightens empathy for others.
He is depicted as a man with many appearances, which means the faces of all men and women. There are also many depictions in which he is said to hold a book referred to as a grimiore in his right hand. He also protects the Forbidden Library of Bibliotheca within Hell and almost always has a book with him.
Sloane MS 3824 mentions Dantalion in an invocation in "An Experiment to Obtain your Desire," as well as in the "Experiment of Bleth," where he is attributed with teaching various subjects, exposing secrets, mind control (including love magic), and creating an illusionary image of any person's face. According to Rudd, Dantalion is opposed by the Shemhamphorasch angel Haiaiel.
He had said that the Egyptian queen Cleopatra had made a deal with him.