|Dates||???? – 2019 (killed by Belphegor)|
|Episode(s)||15.03 The Rupture|
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.
Ardat, possessing a doctor, kills a nurse as Arthur Ketch tries to leave the hospital, then angrily confronts the hunter for failing to kill Belphegor. Arthur tries to attack Ardat with an angel blade, but is overpowered by the demon, who recognizes that Arthur is protecting his friends and won't give them up for anything. Ardat rips out and crushes Arthur's heart and then uses his cell phone to trick Dean into revealing what the Winchesters are up to.
After Belphegor and Castiel get Lilith's Crook in Hell, Ardat attacks them. Struggling with Castiel, Ardat explains that she has watched Belphegor for centuries, just waiting for a chance to seize power in Hell for himself. As Ardat is distracted with Castiel, Belphegor stabs her in the back with an angel blade, killing her. Belphegor admits that Ardat was telling the truth, and he is killed by Castiel when he tries to use the crook to gain power.
After saving the world, Dean receives word of Arthur's death and that it was probably a demon. Dean shares this news with Sam, though neither know that it was Ardat who was responsible.
Ardat in Lore
Ardat Lili is a Sumerian storm spirit and vampiric succubus. Ardat is closely tied to Lilith, as either a handmaiden to Lilith or a closely-related spirit.