A strange new operator appears on base one day. Everyone else acts like he was there the whole time, but you don't remember him at all. He doesn't speak, mainly communicating in weird chittering noises and sign language. They call him "Roach"

One night, you're walking through the base to get a late night snack. Suddenly, you hear that telltale chittering noise behind you. It's Roach. He's just standing there looking up at you.