I have yet to give this character a name but since I need to refer to him, I will simply call him the Stranger for now.
Sometimes I will post directly as the Stranger, observing events. You are allowed to see the stranger only if you have had contact with him before: So if he's standing on a roof in the distance, watching the group, at the moment only Mike would see him. He will make direct contract with other characters, don't worry. But don't have your character talk about the stranger to other players characters unless I say so. Just some game mechanics/story telling device I will be using.
-Night