The Darkness Devil is a devil that embodies the primal fear of the dark. Nothing is currently known about the Darkness Devil's personality, except that it will attack anything it perceives as a threat.[2] Even though it is almost entirely silent, it is shown to be intelligent and capable of reasoning, as a human can make a contract with it. Like other devils, it displays high animosity towards Chainsaw Man because of the threat he poses and relation to it's counterpart.