There are multiple antagonists in The Fireplace. Most prominently, there is a curse on the logs in the fireplace. The logs were taken from a tree used during a lynching in the past, and burning them attracts tragedy and death which we see taking place over multiple time periods. Also, one of the logs becomes sentient and, while on fire, flies around and murders people. The characters Mother and Pleatherface are also antagonists in the film. The are a mother and son duo who go around murdering people in a slasher-movie style. The mysterious Main in the fire is probably the main villain in The Fireplace. He has the power to move through time via an elevator in the fireplace, and he offers to help people with their personal issues. He is likely a demon or the Devil, though his true nature is never revealed. The sheriff and his deputy are revealed to be surprise antagonists near the end of the movie. They are both part of a cult who appear to worship the Man in the fire and the deer-headed being who is seen accompanying him. Also, there is an alien who uses a gun to suck people's insides out through their face.