The Lost Initiate

 is an unmarked Fallout 3 quest.

During a training exercise in Falls Church, Knight Church, Paladin Hoss, Initiate Pek, and an unnamed Paladin were separated during a super mutant attack. Knight Church was killed in the initial attack and Initiate Pek became trapped in an office building while Paladin Hoss and the other Paladin were fighting nearby. Paladin Hoss will inform you that Pek has barricaded himself inside a janitor's closet towards the back of the first floor and request your assistance in reaching the office building where Pek is located. Once complete, you are asked to storm the building and rescue Pek, who is cowering in a corner due to a gun jam. With sufficient Small Guns or Repair skill, Pek's gun can be fixed; regardless of weapon status, Pek will follow you until you exit the building and regroup outside with Paladin Hoss.

Possibly related, two dead Brotherhood of Steel Initiates can be found with two supermutants in the other office building in Falls Church.

Rewards

 * You are awarded XP for helping Pek (amount of XP varies between 250-350 points).
 * If you ask Hoss for payment you will receive caps when you have rescued Pek but will not be awarded any Karma.
 * If you do not ask for payment you will receive good Karma instead and Hoss as well as Pek will join up with you and help you clear out the area.

Bugs

 * Paladin Hoss and Pek suffer from some rather nasty AI bugs when following you around. Please refer to their pages for more detailed information.