Stanislaus Braun

Stanislaus Braun was a brilliant Vault-Tec scientist before the war and the creator of the GECK. Amazingly, he is alive 200 years after the Great War, due to an advanced stasis chamber, and holds James hostage in Tranquility Lane.

In the simulation world Tranquility Lane, Braun has taken up the identity of a little girl named Betty. In this world, he sends the player on evil quests that range from making a child cry, to killing every resident. Killing the residents is apparently not permanent, as Braun is able to reset the simulation, the residents, and their memories at will to do it all over again.

Previously Braun had been using other simulated worlds such as a "tropical paradise" but quickly grew bored with them as they lacked sufficient variables for him to play with; he never grew bored of "Tranquility Lane" however, as it provided unlimited opportunities to torment people for his amusement.

His identity as "Betty" is explained simply as him being bored with his true form--in the simulator he can be anything he wishes to be, and he happens to feel like trying out the form of a young girl. As "Betty," Braun speaks in the perfectly simulated voice of a real little girl but once he is revealed, he tends to alternate between the "Betty" voice and his real voice. Most of the brainwashed residents of Tranquility Lane are unaware of Betty's true nature, though a few are vaguely aware she's important and one child says "she's mean."

Appearances
Stanislaus Braun appears in Fallout 3.

He also appears in "When Harry Met Sally" (The Musical rendition).