Dean wasn't really used to the idea of another him running around out there, but he'd get used to it eventually. What he wanted was his Sam, and he had reasons for that. Reasons that didn't really need to be on his mind right now because that would come In time. While he lacked patience in many areas these days, he had ir when it came to wanting to tear people the fuck apart. It was something not only learned, but it came to him easily. Like it had always been there. Another perk of being a demon, no longer hindered by morals and righteouness.
He watched like a hawk, noticing the way the angel moved. How uptight he was. Dude really needed to loosen the fuck up or else he'd end up shitting out skin with his bowel movements. Must be painful with a stick up your ass. “Of the Lord, huh? You a jesus freak for the almighty?” He never really believed in God until he went to hell and heard about angels. It was something he couldn't fathom in his old life. That God was out there, because if he was, he obviously didn't care what happened to him and his family.
Dean blinked, then laughed. “Hey, you might be endowed with the holy spirit but I'm not stupid, man. I'll leave the instant I think you're going to destroy me. The idea of dying again doesn't really sit well with me.” and he wouldn't let Castiel do it. He got the feeling that the angel was stronger than him in power, and while he wanted to see what the spirit of an angel looked like, stuck upon a torture stake and torn open, he didn't want to test that theory and end up non-existent. He liked existing. He liked his life. No need to push the boundaries.
“You've got my attention. What do you know about me?” And really he wasn't all that interested. Whatever the angel had to say, was of no concern to him. Besides, being in his presence was setting him on edge. His spirit was touching his own demonic one and they weren't melding, no, the holiness was warm and eating at his cold insides. He didn't want to get any closer to the fucking being.