I am probably going to be getting a handful of them can you tell me anything about them?

So far I have called mine couple of times only apart from the initial welcoming ritual. He is in his realm, comes only when summoned, at least mine.

I have been full of energy from mine now for a day or two. I was wondering why. I'm told this is a common side affect getting new companions. Order just completed. We will see. I think I been seeing them though. Look up there is a just a shape of something then disappears but it's like I wanna say a dark orsngr kinds color no real shape though. Then disappears. Last time this happened I had a angel visit and I was seeing white blobs appear and disappear.