Mister Crowley

Mister Crowly is a resident of the Underworld who gives the player the "You Gotta Shoot 'Em in the Head" Quest.

Mister Crowly can be found in Carol's in the 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.