As mentioned above all of those spirits are from Ars Theurgia Goetia. They are aerial spirits. They do not have specific powers for what one can do, they all can do! It also says they are willing to whatever the will of the magician is. As far as working with them…originally you was supposed to use the method of conjuration from the Lesser Key of Solomon, but Corwin Hargrove’s book Demons of Wrath has a good way to work with these spirits also. It only requires three days and all of the spirits from his book are from Ars Theurgia Goetia. I used it and in my experience, they were the fastest spirits to respond I’ve ever had…although the feel of pressure like a 500lb man sitting on my chest and a high pitched ringing in my ears the whole time wasn’t the most pleasant feeling but I carried on and finished it.