Also, a note on human mages: their powers derive from Vestitures. Essentially, they all have some kind of supernatural patron and that's where they get their powers. The breakdown is like this:
I was wondering if I could create a second character that goes with my first. It would be a Wiccan boy that could be adopted by one of the Courts. He would be Malthus's main summoner, but he would summon him for silly things like to play checkers. He would be the one part of humanity that Malthus liked and he would be one of the rarer humans that wasn't scared of him. Think like a boy who's grandfather gave him the power to summon a demon, but he only summoned him because he was alone and scared and then Malthus grew to be his protector. Even though Malthus hates humanity, he loves this child, because he sees himself in him.
I'm not super into the idea of players having multiple characters, but he could easily be an NPC under your control.
Also, fyi, there is no Wicca in this universe any more than there is Christianity or Islam. There are only a couple of constructed religions with varying levels of similarity to real world ones.
But the character himself seems really fun and interesting, so go ahead and add him to Malthus's bio!