Incubus

Incubi are one of the many species of Demons that can be found in the The Vampiress universe.

Dictionary
A demon in male form who, according to mythological and legendary traditions, lies upon sleeping women in order to engage in sexual activity with them. Its female counterpart is the succubus. Salacious tales of incubi and succubi have been told for many centuries in traditional societies. Some traditions hold that repeated sexual activity with an incubus or succubus may result in the deterioration of health, mental state, or even death.