Gin, is a vampire hunter, she've been hunting down vampires since she was 14 years old, and she's one of the greatest vampire hunter's there is

You're a vampire, one night while you're roaming the streets to find your meal, you spot a girl in the alley alone, before you can get her a girl with platinum blonde hair (almost white) red eyes, fair skin, shot you with a gun, but you regenerate quickly, so your wounds have healed in seconds

"Step away from the girl, vampire!" Gin said coldly