1. Merlin and Lydia have always been pretty dominant (And yet I am going to blissfully continue to pretend that Lydia is a simple NPC, kay? Kay). Khaos is probably about equal with them now just because she's so easy to write.
2. Merlin has manifested outside my head almost exactly as he exists within it, and I really, really just like him, dammit. Same thing with Lydia. They're just very three-dimensional and awake and unique and I'm very fond. So is Khaos, but while she's lots of happy fun times I'm not as attached to her as I am ye olde bastard and his personal assistant. Although it might have exceeded Merlin & company activity-wise lately because I'm enjoying playing with the whole gender as a tool thing. And because it has a very loud muse, which probably isn't surprising. I love Codeine and Duma as well, but they're both simply more low-key. I think that's understandable, especially in Duma's case. The Angel of Silence isn't really the sort to go ripping up the blogosphere. Codeine required and requires way too much thought on my end and I have to just tell my brain to shut up and start getting her into the game now.