Mister Crowley

Mister Crowley is a ghoul resident of Underworld in the Capital Wasteland

Background
Twenty years ago, Crowley and four other mercenaries - Dave, Jeff Strayer, Dukov, and Tara - were sent to Fort Constantine by Allistair Tenpenny to retrieve a rare weapon. During the mission, Crowley was locked in a room full of feral ghouls by Dukov, who wanted to increase his own share of the payout. Crowley survived the imprisonment and harbors a passionate resentment toward those who left him behind.

Daily schedule
Mister Crowley can usually be found in either the Ninth Circle or his bed at Carol's Place in Underworld. He usually sleeps until 12 PM.

Effects of player's actions

 * If the Lone Wanderer retrieves the keys detailed in Crowley's quest, but does not return them, they can go to Fort Constantine and take the T-51b power armor. Mister Crowley will not be happy, however, and will only respond with "You stole what was rightfully mine! Get lost." There is not an option to give the suit to him. He will say the same thing if the Lone Wanderer pickpockets the keys from him after handing them over.
 * If the Lone Wanderer hands Crowley the keys and later travels to Fort Constantine's bomb storage section, Crowley will be inside wearing the armor and thank the Lone Wanderer for the keys.
 * If the Lone Wanderer follows Crowley to Fort Constantine on foot (not by fast travel), he will turn hostile just outside of the fort. If the Lone Wanderer does not engage Crowley, he will turn up back at Underworld wearing the armor.
 * If the Lone Wanderer kills Crowley at any time, they will no longer be able to collect caps for this quest. The residents of Underworld will turn hostile for 72 in-game hours if the Lone Wanderer is detected in this act.

Appearances
Mister Crowley appears only

Behind the scenes
The Fallout 3 Official Game Guide uses the lyrics to Ozzy Osbourne's song Mr Crowley in its walkthrough of You Gotta Shoot 'Em in the Head.

Bugs

 * Occasionally, Crowley will go into a bout of slow-motion sprinting, running at nearly half speed but with full striding animation. He will resume normal movement upon his next combat encounter.
 * Crowley may deliver his theft line if the Lone Wanderer acquires the winterized T-51b power armor from Operation: Anchorage, even though it is not Crowley's actual armor.
 * With Broken Steel installed: After getting the T-51b power armor and helmet from Fort Constantine by unlocking all the doors, then finishing the You Gotta Shoot 'Em in the Head quest by giving Crowley the keys, and fast traveling back to snatch the armor before Crowley finds out, Crowley can be encountered in the presidential metro, just inside the doors from M.A.R.Go.T., during the Who Dares Wins quest.
 * Occasionally, Mr. Crowley will not appear in Underworld.
 * If the Lone Wanderer hands over the keys for the reward, then pickpockets them back and travels to Fort Constantine to get the T-51b power armor without killing Mr. Crowley, he will disappear from the game.
 * Sometimes, if the Lone Wanderer completes the quest, Mr. Crowley will repeat his theft phrase and not show up at the fort. Also, if the Lone Wanderer steals the keys and tries to get the armor, the game does not recognize that the Lone Wanderer has the keys.