|Title/Alias|| Fergus Rodric MacLeod (as a human)|
King of Hades (Balthazar)
The Salesman (by Abaddon)
Lucky the Leprechaun (by Demons behind his back)
|Occupation|| King of Hell|
King of the Crossroads (originally)
Lilith's second-in-command (formerly)
Tailor (formerly, as a human)
Winchester Family (loosely)
Lucifer's Army (formerly)
Dick Roman (briefly)
Abaddon (unwillingly; briefly)
|Family|| Unnamed mother †|
Gavin MacLeod (son)
|Portrayed by:|| Mark Sheppard|
Lauren Tom (briefly)
Marco Soriano (briefly)
Although he initially served Lilith, he went rogue in Season 5 after her death and Lucifer's release, aiding the Winchester brothers in resealing the latter back into his cage. With the power vacuum in Hell unoccupied, and to protect himself from the wrath of his fellow demons, he appointed himself the new King of Hell.
Crowley allied with Sam and Dean in Season 5 against Lucifer to obtain the Four Horsemen's rings with them, then with Castiel to obtain the power of Purgatory and briefly Raphael in Season 6, and then with the Winchesters again in Season 7 against the Leviathans. However, as of Season 8, he cuts his allegiance to the Winchesters and Castiel, seeking vengeance as well as attempting to capture the Prophet Kevin Tran and The Word of God to further his own goals, only to be captured by the Winchesters as part of their plan to close Hell. In Season 9 Crowley was temporarily Sam and Dean's captive while being hunted by Abaddon as part of her plan to takeover Hell. However upon being freed as part of a deal Crowley worked with Dean in a quest to find Abaddon and kill her with the First Blade and has resumed his post, and is currently helping Dean with his transition into becoming a demon after he was killed and restored by the blade.
Crowley was one of the two main antagonists in season 6 and served as the primary antagonist of Season 8. He is the most recurring villain of the series and arguably serves as the series' main antagonist as a whole.