Okay, he's one of the system's minions, but exactly what kind of minion is the question...

Is he doughy, or ectomorphic with a papery look to the skin? No muscle tone?

Golem or zombie

Is he muscular with a small nose and firm jaw?

Reptilian (most likely white and blond as well)

Is he psycho at times and have eyes that can go completely black with enlarged pupils while seeming to "recite" something from God Knows Where?

Mind-controlled

Is he an asshole who likes to take advantage of others at every turn?

Corrupt human who is aligned enough to the Dark to allow demonic forces to control him.

I think that about covers it.