Ardat
History
Ardat is a demon who possesses a woman Ketch describes as attractive and has an intense hatred for Belphegor.
Episodes
15.02 Raising Hell
Ketch arrives in Harlan, Kansas, to lend aid to the Winchesters. He is surprised to find Belphegor helping the Winchesters, and explains he was hired by Ardat to kill Belphegor, whom she described as a monstrous threat to humanity.