Vampires are one of the five known monster types.
Like the humans, the vampires are organised with a strict hierarchy, with the elder vampires with more experience and age than the younger or newly-turned ones. They also have forms of cults where they practice an ancient religion, mainly revolving around a human sacrifice.
As with zombies, vampirism is spread to humans via a vampire virus (often from a vampire bite). Unlike zombies however vampires appear to be able to procreate on their own (Andrius and Dominik being sons of Dagan).
Vampires are characterized by pale skin and red eyes that appear to glow in the darkness. Vampire society is hierarchical, most vampires being subservient to the ancient order of elders (though there are a few exiles who seem to exist independently; such as Katherine ).
The average vampire has faster notions of speed in the darkness and are often tougher and stronger than humans. Some can even enter the Dream World, with stronger vampires being able to use Mind Crafting.
Naturally, Vampures have the traditional weaknesses, notably being harmed by exposure to sunlight (prolonged exposure being able to kill them). The worst trait for a vampire is their constant thirst for blood and would need a constant supply of such to keep themselves nourished. Intelligently, they are known to organise various ways to 'farm' blood, most notably blood farms.