The Humanoids are enemies that don't seem to be actual suits. They appear to be more human-like than what a suit would be. These Humanoids are:
The Undying is a red-colored figure in the form of a very tall, humanoid-like being with very little face details and no eyes. He will start in Meat Freezer, then go to Office. You need shut off a cam or a power, or you'll be killed.
He also appears in Pirate Caverns chasing player on 2nd Floor.
Slester is a humanoid that resembles a voodoo doll of sorts with big empty eyes and a droopy mouth with what appears to be suture marks on its chest and stomach, it could also resemble a Haniwa which are terracotta clay figures that were buried with the dead in Japan between the 3rd and 6th centuries. It also appears to have two needles through its body, one going through its shoulders, and the other through its head.
Unlike Undying and God, this Humanoid has a name that is the name of one of the interns who got missing, which his name was Henry which was missing in Pirate Caverns. Henry is a distorted, yellow figure, which his color could represent Photo-Negative Mickey's yellow blood. He is missing his right arm and his head. A shape of a shirt and boots are visible. He will start in the Meat Freezer and can move to the Lounge and the Office.