Paladin Tristan

 is a Paladin of the Capital Wasteland Brotherhood of Steel who is added to Fallout 3 in the add-on Broken Steel.

He is the acting field commander of the Brotherhood forces in light of Sarah Lyons being down for the count, and is in charge of a Brotherhood operation involving the player and Liberty Prime, the first mission in the main Broken Steel questline.

Quotes

 * "Well well, look who's back amongst the living."
 * "Basic rule of thumb on these operations; keep your head down and let the robot do most of the heavy lifting."

Appearances
appears only in the Fallout 3 add-on Broken Steel.

Bugs
It is possible, that after the mission "Death from above", Tristan can be crippled in one or both of his legs and will remain that way until a new file is made. [Xbox 360]