Matthew (Fallout 2)

Matt is the Brotherhood of Steel agent staffing the San Francisco outpost of the BOS around 2241.

Background
He gives The Chosen One the quest about Vertibird plans when they first meet.

If The Chosen One completes the task, Matt ends up being killed by the Enclave's own Frank Horrigan 2 days later. (It has not been confirmed what The Chosen One's decision was, or if Matt survives, in Fallout canon)

Interactions with the player character
Somehow, he knows the Chosen One's name even before they first meet. He wants the Chosen One to get the vertibird plans for the Brotherhood of Steel and will put Navarro on the map.

Completing this mission will earn 20,000 XP as well as access to the Brotherhood bunker. The Chosen One also gets to keep the original plans for use with the other quests from the Hubologists and the Shi. Two days after this Matthew will disappear, and accessing the ACE computer in the bunker will reveal what happened to him.

Appearances
Matt only appears in Fallout 2.