Shadow

Description
Shadows are wraith-like enemies that all have a hood, are pitch black, have small white eyes, and a creepy smile. Despite all that, they are the weakest killer in the game. However, they have a strange gimmick; there is 6 of them. All 6 spawn in random spots, with only 3 spawning at named locations; Military Tent, Radio Tower, and the Factory.

In-game Info
On their sign in the showcase room: "'Shadow - These things aren't strong or fast, but they're plentiful. There's a total of 6 of them. If you see one, try to stay away.'"

Trivia

 * Shadows are the only enemy to not have a light or music.
 * The face used for shadow is actually the Cheshire Smile from SCP-087-B.
 * Once, while testing on his phone, Blue was startled by a Shadow that had snuck up on him. He now regards Shadow as "Basically my bonnie" as a reference to how the creator of Five Nights at Freddy's, Scott Cawthon, had nightmares of Bonnie the Bunny.