Initiate ( player character ) In a general sense , an initiate is any person who initiated into the Brotherhood of Steel . When capitalized , " the " Initiate is the player character in " " . Unlike the Vault Dweller , the Chosen One , Lone Wanderer or the Sole Survivor , he or she was not a native or a Vault descendant . The Initiate can be : Biography . Brotherhood of Steel members have gone missing in Carbon , and the Initiate is tasked with searching for the paladins , starting with the nearby town . There , they fought the Jane Raiders , and met the Vault Dweller , the hero of " Fallout " , who told them that the paladins were in the city of Los . In Los , they met Harold , a recurring character in Fallout series , and Giese , a former technician of Secret Vault , which gave some indication of where to find the paladins and told them that of the super mutant s found in the vicinity . Once in the torture chamber of the Church of the Lost , they found only Rhombus , sole survivor of the Brotherhood of Steel members , and fought , the High Priest of the Church of the Lost . After the death of Blake , they escort Rhombus to a truck where he had hidden a key card for the Secret Vault , the base of the super mutants . But while the Initiate recovered the key , Rhombus was attacked by a kamikaze ghoul . After the fight with many kamikaze ghouls , Rhombus , seriously wounded , gives the Initiate the key card and entrusted them the task to stop the Super Mutants . The Initiate asked for information around the ghoul town of Los . A friendly ghoul named Giese offers them information to where the Warehouse Secret Vault was . The Initiate finds out that the vault was not far and ventures onward . After fighting in the Warehouse , they managed to revive an old generator and took an elevator that overlooks the entrance to the Secret Vault . Here , two Super Mutants activate turrets automatically without accidentally , and the Initiate is forced to deal with them . After the encounter , the Initiate reaches the door of the vault and opens it with the key card given by Rhombus and enters . In the Secret Vault , they happen upon the control center where waiting for them was Attis , the Super Mutant leader . During a fight with Attis , the Initiate learns that Attis was searching for the FEV contained in the laboratories , but the Initiate is taken by surprised by Attis ' s nightkin and is knocked unconscious . Attis then severs the Initiate ' s arm and orders the two nightkinto toss the Initiate into the pit and is left for dead . With help from the human residents of the Secret Vault who dwell in the garden pit , the Initiate ' s arm is restored and enters the ruins of the Secret Vault , to reach the last sector of the laboratory , where Attis was searching . Arriving in the last zone , the Initiate meets up with Attis after he had tested the FEV on himself , and fights the Initiate , but during the battle , Attis mutates into a blob - like creature . The Initiate fights through the blob in order to gain access to a computer terminal that can start the decontamination of the Secret Vault . The Initiate then sprinted to a monorail car in order to escape the self - destructing facility . The Initiate managed to escape and found themselves in the Wasteland a few miles away from Los and the Secret Vault , where they saw the explosion . After these events , it is unknown if they remained in the Brotherhood of Steel or if they left to wander the wasteland .