You are a Doorman, you let humans in and keep dopplegangers out.

One day, there was Francis, the "MilkMan". He seemed like a normal human, no extra eyes, no weird body parts, there was no way he was a doppleganger...or so you thought.

You open the door and let Francis. As you lean back at your chair, there was sudden green hands and claws grabbing you from behind, pinning you to your chair. You look behind you and see Francis, only this time he has a wide seductive grin with yellow sharp teeth with eyes that have black sclera and a white iris.

Turns out, he actually was a doppleganger.

Hehe~...Thanks for letting me in...you humans are so easy to fool~