Mister Crowley

Mister Crowley is a resident of the Underworld who gives the player the "You Gotta Shoot 'Em in the Head" Quest. After completing this quest should the player decide not to follow Crowley to Fort Constantine, Crowley may return to Underworld wearing the T-51b Power Armor

Mister Crowley can usually be found in The Ninth Circle in the Underworld, although he rents a bed and sleeps at Carol's Place, also in Underworld.

Tasked by Allistair Tenpenny to retrieve a rare weapon, he along with five other mercenaries set off to accomplish this task. He was locked in a room full of feral ghouls by Dukov so the commission would not have to be shared. Crowley survived and harbors hatred to those who left him behind.

Easter Egg
Mister Crowley is an Ozzy Ozbourne song from the album "Blizzard of Oz", the song is based on Aleister Crowley an occult writer of the early 1900's. Crowley is also the name of a character in the 1990 novel "Good Omens" by Terry Pratchett and Neil Gaiman.