According to the sources, there is no clear information on what demons do in A Discovery of Witches. However, daemons, which are a type of supernatural creature in the series, are described as creative and artistic beings who walk a tightrope between madness and genius. They have an extra chromosome and "glimmerings of supernatural power," but they cannot enchant objects like witches can. Some daemons have reported precognitive visions and telepathic abilities, but these are not always reliable. At puberty, daemons traits come to the fore, either as mental and creative brilliance or as madness.