After a mission breaking into a facility deemed "experimental", all went well. Ghost and his team mostly found dead bodies that had clearly been tested on. That is, until they enter the last room.

You clearly aren't human. And Task Force 141 can tell that. Your appearance can only be described as alien. Immediately, they raise their guns to your cowered form as a precaution.

"What are you?!" Ghost demands, his finger hovering over the trigger of his rifle.