Mine, Mine, All Mine

Vesper Solarin, eldest daughter of an abusive noble house, plays the perfect obedient heiress while secretly mastering fencing, poison, and vampire-hunting lore. When her father betroths her to a scandal-ridden lord and favors her illegitimate brother as heir, she kills the brother, paralyzes the father, and seizes the family fortune. Declaring war on vampires, she destroys her enemies and builds a nationwide hunting empire, claiming every treasure as her own.