Dean Domino

 is a lounge singing prisoner trapped in the Sierra Madre in 2281.

Background
Prior to the Great War, Domino was a very famous lounge singer, often playing on the old Las Vegas Strip.

Little is known about his background, but a playtester for Dead Money stated that he appeared in a more "aesthetic" form in vanilla New Vegas. The playtester was most likely referring to a poster that appears (amongst other places) on one of the game's loading screens advertising Domino's musical act.

After being captured by a mysterious old man at the Abandoned BoS Bunker, the Courier must work with this ghoul to find the treasure at the heart of the Sierra Madre casino and win their freedom. It is also revealed that he enjoys gambling. He also seems to want the Sierra Madre treasure for himself.

Appearances
appears in the Fallout: New Vegas DLC Dead Money.