This Comic's Cast:

It's never established in Castlevania continuity why the minions all serve Dracula. Sure, some of them are probably magically bound, but not all of the minions are brainless monsters. They aren't all undead, or demons, or Greek monsters.

It has to be for the money. He does have a treasury. Gotta use it for something, right?
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.