Flauros is a strong Great Duke of Hell, having thirty-six (twenty according to Pseudomonarchia Daemonum) legions of demons under his rule.
He gives true answers of all things past, present and future, but he must be first commanded to enter a magic triangle for if not he will lie, deceive the conjurer, and beguile him in other business. But if he enters the triangle he will answer truly, and gladly speak about divinity, the creation of the world, himself, and other fallen angels. He can also destroy all the conjurer's enemies by burning them up. If the magician requests it, he will not suffer temptations from any spirit or in any form.
Commonly people represent him as a humanoid leopard with big claws. Flauros is depicted as a terrible and strong leopard that under request of the conjurer changes into a man with fiery eyes and an awful expression.
Flauros can also supposedly be called upon when a mortal wishes to take vengeance on other demons. This is likely included in his capability to destroy the conjurer's enemies.