Blood: The Last Vampire

Summary:
A vampire named Saya, who is part of covert government agency that hunts and destroys demons in a post-WWII Japan, is inserted in a military school to discover which one of her classmates is a demon in disguise.
                                                
Great movie, doesn't represent the anime much. All it had was the fact she was a "vampire" with a sword. It was easy to follow and had action....and drama, I could have gone without the drama, but ehhh.

Maybe they decided to tweak a few things such as: knowing what she is, turning Diva into her mother, and no cool minions, yet minions.