Graham Jones is pretty much the main villain of Castlevania: Aria of Sorrow, though ironically not the final boss. You hate him in a good way.

He at first seems to be kind of friendly towards Soma Cruz but there’s definitely something off about him.

As we are led to believe that he is the reincarnation of Dracula, because he was born on the same time frame of which Dracula was permanently killed by Julius Belmont.

And his final battle is very similar to a Dracula fight with some of the same moves and definitely the same kind of carnage.

But funny enough, it’s actually Soma Cruz that’s Dracula reborn and at some points he resists the urge to become the dark lord again. He ultimately saves himself and becomes a good person.