Asmiel: A demon connected with the hours of the day, Asmiel serves the infernal king Symiel. Reputed to
possess a good and obedient nature, Asmiel holds the position of duke and rules over sixty lesser spirits. His name and seal appear in the Ars Theurgia, where he is identified with the direction north.
Asmiel also appears as one of a number of demons listed in the Sacred Magic of Abramelin the Mage translated by the Occultist Samuel Liddell MacGregor Mathers.
Here Asmiel is said to be a servant of the four demonic princes of the cardinal directions: Oriens, Paimon, Ariton, and Amaimon.
As such, he can be summoned and controlled in the name of his superiors.
SOURCE:
The Dictionary of Demons written by Michelle Belanger