


This is confirmed by finding the case file under Nick's bed in his office. He demonstrates a knowledge of who the Stranger is, or at least what he can do.

Nick Valentine has a unique reaction to an appearance of the Mysterious Stranger if he is the Sole Survivor's companion at the time.The Mysterious Stranger will have vanished from the map by the time the player character exits V.A.T.S., meaning that it is impossible to interact with him, though some companions will comment on his brief appearance.There are several variations of the Mysterious Stranger's appearance jingle and disappearance chime, which are randomized when he appears to assist the player character. The jingle for the Mysterious Stranger is a similar version of the one heard in Fallout 3, although more high pitched and with a piano riff in contrast to the previous guitar riff.Rank 1 grants a 10% chance of an appearance When he kills an opponent, there is a high chance your Critical meter gets filled. The Mysterious Stranger appears more often in V.A.T.S. When he kills an opponent, there is a chance your Critical meter gets filled. Who is he? Why does he help? Who cares! The Mysterious Stranger will appear occasionally in V.A.T.S.
