Vampire

Possibly the most well-known sincubus, the Vampire is often considered an entirely separate creature. However, vampires are actually sincubi who feed on natural energy in the form of blood.

Appearance
Vampires are often very similar to humans. Their two most obvious physical differences are their progressively more vestigial fang-like canine teeth, and their more athletic physique. As Vampires must sometimes resort to hunting their prey in the traditional sense, they are more physically powerful than most species of succubus, and are certainly more powerful than humans.

Behaviour
The Vampire is probably the most vicious of succubi to draw on natural energy. Vampires feed by drawing blood directly from their victim, whether or not they are engaged in sexual intercourse. Traditionally, Vampires used their elongated canine teeth to pierce the carotid artery in the neck and drink directly from the bloodstream. However, in modern times, Vampires often draw blood under medical pretence, or steal it from blood banks. Due to the depopularisation of bloodletting, Vampires have dwindled in number.

Few humans are actually in danger of being attacked by Vampires, as most prefer to feed on blood previously taken from a human. In rare or desperate cases, Vampires will hunt humans as do predatory animals: They will stalk their prey, then kill it when it is alone and vulnerable. The easiest way to avoid a Vampire attack is to stay with other people. Despite their danger, it is far more likely any given person will be murdered by a human than a Vampire.

Trivia

 * Alongside sincuba, vampires are the sincubus subspecies most accepted in human society.