Yeah he's like half robot half human, it's kind of bizarre. He's actually really nice.
[Pixie] I don't know if we know everything he's been up to. I mean, I think it's weird that he's in Castiel's body. Even if he has to give permission for that it makes me wonder why he would and I feel like the answer is probably because Lucifer would do something bad if he said no. It's not quite as obvious as the thing with Jadis though. She was turning people into stone already, and he just... could turn people into stone, probably, and doesn't seem to be trying to convince anyone he won't. I always try to make it really obvious I'm not evil, but I guess that's just me.