Unidentified interviewer

 is an unseen character (the viewer only hears his voice) in the Believe trailers for Halo 3. Although he is not seen, he sounds like a middle-aged man with an English accent. He interviews some retired soldiers about their experiences during the Human-Covenant War for the Museum of Humanity, therefore it is quite likely he works there, however, he is also seen out in the woods in one of the shorts.