Well, yes. That's why he picked them.

[Hector can see you sulking, Belmont. Don't turn into an Alucard. Hector leans back into his chair with a huff.]

You know, you'd make a shitty scientist. It's a sampling bias. You only see the old, powerful vampires that have lost themselves to bloodlust, because those are the ones you get called to hunt.

[Are there other kinds of vampires? In Wallachia, who knows? But here in Aefenglom, there certainly are.]