A vampire is the living dead, a male or female somewhere between living and dying who needs to feed off the blood of the living to survive and keep up their strength, some only need to feed every fifty years. Also when they bite their victims, the victim eventually dies and becomes a vampire too. They have great speed, reflexes and incredible strength, Some of them can fly and transforms into bats or shapeshit into other people.
There are a few ways to defeat them. the most effective way is to drive a wooden stake into their heart. Other methods can include exposing them to sunlight or holy items or garlic, also in some cases burning their coffins. Also Vampires can't resist Raven's blood with nightshade and mandrake all the way from Romania.