Well, then by your definition, no one in Yharnam is a vampire. [She sounds amused by the dichotomy of it. Edelgard simply mentioned drinking blood, he has more specific definitions. One fits where Maria is from, the other... she can see it, but it's not really completely fitting into the framework.] No one needs the blood for nutrition there. It's an addictive substance, not a food staple. It's more or less replaced alcohol, in the town.

[Ah, all the fun peculiarities of Yharnam.]

Hm... quicksilver bullets for hunting Beasts are mixed with the user's blood. Ours makes for a very potent addition, and one that does more damage. [She motions at her sword.] Most of the Cainhurst Knights used weapons with rippling channels down the side to pour their blood into to bolster the power of the blades. The most powerful among the Vilebloods though... didn't need a medium. You could do it with any sword. Including my own, which was made specifically not to need blood to make it more powerful.