In Christian demonology, Amy is a powerful Great President of Hell.
According to the German demonologist Johann Wier in his 'Pseudomonarchia Daemonum', Amy is and one of the princes of the infernal monarchy, ruling 36 infernal legions. He is the 58th of the 72 spirits of Solomon and his orders are acknowledged by the fallen angels; he hopes that at the end of 200,000 years he shall return to heaven and occupy the seventh throne.
Amy appears in Hell in the form of a flaming fire, but on Earth he puts on the shape of a human being.
Amy's office is to make one wonderfully knowledgeable in astrology and all the liberal sciences. He is also said to provide very good and faithful familiars, and to help find hidden treasures guarded by spirits.
Amy is a great president, and appeareth in a flame of fier, but having taken mans shape, he maketh one marvelous in astrologie, and in all the liberall sciences, he procureth excellent familiars, he bewraieth treasures preserved by spirits, he hath the governement of thirtie six legions, he is partlie of the order of angels, partlie of potestats, he hopeth after a thousand two hundreth yeares to returne to the seventh throne: which is not credible. Pseudomonarchia daemonum - Johann Wier (1583)
The Fifty-eighth Spirit is Amy, or Avnas. He is a Great President, and appeareth at first in the Form of a Flaming Fire; but after a while he putteth on the Shape of a Man. His office is to make one Wonderful Knowing in Astrology and all the Liberal Sciences. He giveth Good Familiars, and can bewray Treasure that is kept by Spirits. He governeth 36 Legions of Spirits, and his Seal is this, etc. Goetia - S. L. MacGregor Mathers (1904)