Sorry, I got a bit carried away with Wicked. I didn't forget, though!
Varian's a "Starchild" of sorts, yeah. He is the son of several different Elder Gods (The Cthulhu kind of Elder Gods). As far as he knows, he's the only one, but there are a few books out there that actually talk about "Starchildren" and their "Fathers".
Also, Varian's things do move under his clothing. It's very subtle, though.
As for his connection to the Wolves, Varian's a nemesis of Owl. Owl is Rufus' protege', or something like that. All Wolves are supposed to protect her with their lives, or something like that. Rufus actually needlessly sacrificed tons of Soot Wolf lives to save her once. That's how obsessed he is with her!
So yeah. He's an enemy of the Wolves, I suppose. Although I think they don't really know that yet, if this thread's taking place alongside her struggles against Varian (Which have begun very recently, time-line wise).