Willow

 is a ghoul, the self-proclaimed sentry of the Underworld in the year 2277.

Relationships
She has less than friendly views of the Brotherhood of Steel and Talon Company, referring to them as "assholes."

Daily schedule
She can usually be found on the Mall, wandering around just outside the entrance to the Museum of History.

Appearances
Willow only appears in Fallout 3.