Blood: The Last Vampire

Saya (Gianna) looks like an ordinary teenager on the outside, but on the inside, she's a 400-year-old half-human, half-vampire swordfighter who's made it her mission to exterminate vampires. Sent to an American military base in Tokyo, Saya learns that she may finally have a chance to destroy Onigen, the evil vampire leader. But when she forms a friendship with the daughter of the base's commander, she realizes that her ability to bond with humans may be her greatest weapon against Onigen.