Blue: He makes stomping noises. Close the correct door to send him away. You can detect which door he is from by which ear the sound plays.. If you are unsure, use the flashlight on the doorways. Phantom Blue: He will appear in your office slowly. He is not lethal, but will give time for other monsters to sneak in. Gray: He makes a sound cue, if it is a snarl, he is in his black form. If it is clicking, he is white. In his black form, dont turn on your flashlight. In his white form, keep your light on.