Furfur aka Furtur is a powerful Great Earl of Hell ruling over twenty-nine legions of demons. He is a liar unless complelled to enter a magic triangle where he gives true answers to every question, speaking with a rough voice. Furfur causes love between a man and a woman, creates storms, tempests, thunder, lighting and blasts. Also known to teach on secret and divine things.
Also appears as a hart (deer) with fiery tail.
He is depicted as a hart or winged hart, and also as an angel. To some authors, he changes from hart to angel upon entering the magic triangle.