Godfrey

Godfrey is a Mister Handy that can become the Lone Wanderer's personal robot butler in the Tenpenny Tower suite

Daily schedule
Godfrey stays in the Lone Wanderer's Tenpenny tower suite at all times, randomly moving around.

Other interactions

 * The suite, along with Godfrey and his services, may be obtained by destroying Megaton in the quest, The Power of the Atom. Godfrey can tell jokes, restyle hair, advise where to buy better suite items, explain how the pristine Nuka-Cola machine works and give a bottle of purified water up to five times per week.
 * Godfrey knows if the Lone Wanderer is injured when they walk into their suite.

Appearances
Godfrey appears only in Fallout 3.

Behind the scenes
The joke, was also told by a servant robot named 'Andrew' (Robin Williams) in the movie Bicentennial Man, and is originally by Tommy Cooper.