Arthur Maxson

 is the last descendant of the Maxson line, the founders and traditional leaders of the Brotherhood of Steel. At the time of Fallout 3, he is ranked as Squire and still in his teens. He has been placed under the supervision of Elder Owyn Lyons for his own safety, even though The Citadel is located deep in enemy territory.

He can usually be found in The Citadel's B-Ring where his room (and personal terminal) is located.

Appearances
Squire  appears only in Fallout 3.

Behind the scenes
 is likely a recreation of Arthur Pendragon. He is the rightful heir to the Brotherhood of Steel, but has been sent to live with a foster father for his safety. His Kingdom is divided and the factions cannot agree upon a leader. Arthur Maxson is being trained in the ideal of might for right, which his Kingdom has never followed.