Ebony Dark'ness Dementia Raven Way of My Immortal is a vampire, but it doesn't seem to affect her much except for being Immune to Bullets, being pale, drinking blood, and having a liking for Count Chocula cereal. She does dislike the word "cross" to the extent that on one occasion she types it "c-r-o-s-s" and on other occasions changes it to "pentagram", as in "She looked like a pentagram of Lindsey Lohan and Hillary Duff", but on one occasion she still wears cross-shaped earrings. Apparently she could be killed with a "steak." (She had better not go to any barbeques.) Harry "Vampire" Potter might or might not also be a vampire.
A Growing Affection has a blood-drinker demon clan, that drinks Human blood to increase their powers and enslave the people they feed on. Doraku (the only representative of his clan seen) dislikes being called a vampire but admits his clan is the source of the vampire myths.