Defender Sibley

Defender Sibley is a member of the Brotherhood of Steel Outcasts located at the Outcast outpost in Bailey's Crossroads, in the year 2277.

Background
Sibley works under the command of Protector McGraw at the Outcast outpost. Once the player completes the Anchorage Reclamation simulation and opens the locked door to the armory, Sibley will attempt a mutiny with his forces against McGraw, feeling that the player character doesn't deserve any of the technology within the armory.

Quests

 * Aiding the Outcasts: Sibley takes the Lone Wanderer to Olin and the VR pod when he's told to do so.

Other interactions

 * Sibley will mistake a player character entering the Outcast outpost wearing Outcast power armor for one of them, and will take them to McGraw thinking this.
 * If the player character is a female and has the Black Widow perk, a unique dialogue option will appear when the player character enters the base and speak to Sibley. He will lead to Protecter McGraw without the aggression.

Appearances
Defender Sibley appears only in the Fallout 3 add-on Operation: Anchorage.