Mitsuba
"Maybe, but you're also pretty softhearted for a vampire. Alright, if you so insist, I'll lay down my cards. To put it bluntly, I'm an asssassin. Unfortunately these days any potential targets are crazily strong, so at this rate covert assassination won't be enough. I'll have to resort more and more to use my true form. Well, I never targetted you nor your maker. There might be plenty fanatics around who would want vampires see deader than dead, but I only pursue those with a bounty on their heads or if I'm hired by a client. If a vampire hired me to assassinate a vampire hunter, I'd most likely take up the job. From what I know the vampiric society can get notoriously backstabby, so if you get involved further in it, be on guard against any machinations."
She was powerful indeed, but this wasn't just about strength.