Ghost People

The  are a faction in the Fallout: New Vegas DLC Dead Money. They inhabit the area surrounding the Sierra Madre.

Background
Protected by Hazmat suits, yet morphed into something no longer quite human, the Ghost People are the only ones to walk the Cloud. Anyone who isn't savagely killed when they first hear the insidious screaming the Ghost People make is dragged away to a fate that, while as of yet remains entirely uncertain, is probably much worse than dying in the streets.

They are very mysterious, they don't talk to their victims, they're evidently quite agile, highly territorial, they have glowing green eyes, and reasoning skills equivalent to that of the average Feral Ghoul. They don't die very easily - to really kill them you have to decapitate them.

Appearances
will appear in the upcoming Fallout: New Vegas expansion Dead Money. From the picture (above), it looks as though they use a type of bear-trap fist, possibly a new equippable weapon.