Entity X, also known as The Keymaster, presides as the overseer of The Hub. He is the creator of Level Keys and is capable of accessing the every level of The Backrooms. Superficially, The Keymaster appears like a normal human, and from a distance may even be mistaken for a wanderer, although he can be distinguished by pale grey skin and teal-colored eyes. He has long, unkempt wiry black hair, and a light amount of facial hair. His figure is tall yet slim, and he wears form-fitting attire.