Cheros is a demon named as minister to Almias, the demonic Master of Invisibility. In Mathers’ translation of the Clavicula Salomonis both he and Almiras can be conjured to assist with their powers in performing invisibility spells. Cheros also appears in Mathers’ translation of the Sacred Magic of Abramelin the Mage. A.G.H.
Belanger, Michelle. The Dictionary of Demon: Names of the Damneds. Llewellen Publications. 2010. ebook.