Purson is the 20th demon listed in Ars Goetia and a Great King of Hell, being served and obeyed by 22 legions of demons. He knows of hidden things, can find treasures and tells past, present and future. Taking a human or aerial body, he answers truly of all secret and divine things of Earth and the creation of the world. He also brings good familiars.
Purson is depicted as a man with the face of a lion, carrying a ferocious viper in his hand, and riding a bear. Before him there can be heard many trumpets sounding. According to the Grand Grimoire, he is a direct subordinate of Fleurety.