Cheros: This demon is named as the minister of Almiras, Master of Invisibility. In Mathers' translation of the Clavicula Salomonis, both Cheros and his superior Almiras are conjured up to lend their powers to an invisibility spell. This demon also appears in the Mathers translation of the Sacred Magic of Abramelin the Mage in association with an invisibility spell.
SOURCE:
The Dictionary of Demons written by Michelle Belanger