Ghoul guards are characters guarding the Museum Authority Building in 2277.
They are guarding the building from people looking to learn the secret of aqua cura. It is also explained in the note Griffon's bottling instructions that they are the ones who pick up the aqua pura deliveries from the Brotherhood of Steel and switch it with ordinary irradiated water to be sold as aqua cura.
Interactions with the player character
* Only one guard will have a wig
- There are three of them, and they all appear as hostile towards the Lone Wanderer.
- One of the ghouls is often seen wearing a wig from the building's basement, despite Griffon's instruction not to.
Ghoul guards appear in the Fallout 3 add-on Broken Steel.