This might sound a bit off-topic, but it's about Castlevania too. In the castlevania games, Dracula is known as Lord of Darkness. In movies, I have seen the Devil been called Lord of Darkness. And well, I guess Death could be as well.
In the Castlevania mythlogy, the heir of these characters are a bit strange. Dracula is of highest ranking, while Death are right below him. I always thought that order was strange until it was explained in LoI, how Dracula controls Death with a stone.
I find it real weird that the devil is always a normal enemy in the castlevania games. He is the true definition of evil, and should be way up in the rankings.