Clue/Katou (autorejoin): His body is made of plants! The simplest way to put it is that it's basically a plant-bot. It looks realistically human, and even bleeds/reacts like a human body, but it's plants.

He himself is not particularly magical, but he is basically a deceased human with a touch of angel power.

Acheron (theriverlethe): His body appears to be generally a normal human body, except that he has a ridiculously good healing factor all on his own. However, he's actually a god. A really, really powerful god when he has his skills. Also a vampire...ish. Regardless, this boils down to yes, he is ridiculously magical. I can give extensively detailed explanations of anything, but those are the basics.