@Serverclosed
Not sure if he is a reference to something specific, but he's one of the strangers. He wants to explore the mansion, knowing there's something wrong with it, he appeared once or twice before.
@Serverclosed: I always think of him as a Stalker, someone exploring in hopes of getting valuable supernatural artifacts. (Like the games S.T.A.L.K.E.R.: Shadow of Chernobyl etc)