Miller and Marak

Miller and Marak are minor Doom 3 UAC marine characters. They are seen in the Mars City Common Area. They are talking about the people who are coming and going. When you first meet them, they are talking about Corporal Allen who was recently shipped back to Earth due to psych problems. They wonder who's going to replace him and how long he'll last.

It is likely that during the demon invasion, they are killed and/or turned into zombies.