Willow

 is a ghoul, the self-proclaimed sentry of the Underworld. She persistently addresses the Lone Wanderer as a "tourist". She can usually be found on the Mall, wandering around just outside the entrance to the Museum of History. She seems unconcerned with standing around a heavy combat zone, claiming that the Super Mutants don't attack her, as they seem to ignore Ghouls in general.

Willow wields a Laser Rifle, and wears a Merc Outfit. She's somewhat tougher than the average Wasteland citizen or Raider, being slightly above a standard Super Mutant in terms of durability.

She commonly refers to the BoS as "...other ass-holes" confirming the fact that BoS kill Ghouls and that's why Paladin Cross cannot be aqured as a follower while you have Charon folowing you around.

Appearances
Willow only appears in Fallout 3.