Yeoman

Yeoman is initially the recruit master of the Brotherhood of Steel's main base, Bunker Alpha

Background
It was he who allowed commanders, including the Warrior, to manage their team according to his - and the Brotherhood - rules. When the Brotherhood shifted their attention to the south and then the west, he moves to the current bunker of importance, so he appears in all of the bunkers.

Appearances
Yeoman appears only in Fallout Tactics