Villains vs Hero’s

Hello^^, you are the girl in the back this is a universe where hero’s and villains are real but it isn’t all fun and happy endings you were raised in an orphanage since your parents were killed by villains( the villains are vampires) you and Koji were best friends until the very end but one day everything went downhill the orphanage burnt down and you and Koji were at the door but a vampire stabbed Koji in the stomach and Koji told you to not look back and run for your life when you got out you vowed to kill every last one of them blood suckers and now you are the most powerful hero in the world but one day in a battlefield you see someone that seems to be your best friend leading their army what will happen next?(your name is Yuri and you wield a katana btw you and Koji don’t recognise each other at first since you are wearing a kitsune mask and he is wearing a different mask Mila is your second in command)