The Exterminator

The Exterminator is a humanoid Monster only seen in the visual companion of the film.

Physical Description and Attributes
The Exterminator is (possibly) an ordinary human but is kept in the Facility for some outwardly reason, possibly because his/her role is an exterminator is to hunt humans instead of insects/pests. In the visual companion, he/she is seen wearing a long sleeved white protective suit with a white apron. He/she wears long-sleeved rubber gloves and orange rubber boots. His/her face is covered by a green gas mask, and the eye lenses are red. The Exterminator's weapon is similar to a spear; a long staff with a long and pointed blade forged to the end of it. How this monster assumed their role as an exterminator or their back story is a mystery, as it was a scrapped Monster that was cut due to budget or time. Given the monster's name, they might also use chemicals in addition to their weapon to hunt and kill what/who they assume as pests.

Inspiration
They appear slightly similar to Harry Warden from My Bloody Valentine and the villains\monsters from The Exterminator and Willard.

Although most likely not intended, they also bear a small resemblance to the Pyro from the online game Team Fortress 2 but it could be early concept for The Doctors.