He gave the girl a look of unmitigated confusion as she began to speak to him as if he understood her frame of reference. It was a position Castiel found himself in often, when he came into contact with humans, anyway. There was so very much going on on Earth at any given moment that he couldn't possibly be expected to know it all, could he?
"Hell is always down," he was fairly safe in that pronouncement, he felt, and feeling on slightly firmer ground he added, "and all lawyers are evil." They were usually one step away from the process of soul-bartering, particularly those in contract law. Castiel suspected Crowley had invented contracts for the singular purpose of destroying the lives, and souls, of the human race and he had, in this instance, been particularly successful. Lawyers had much to answer for.
For someone who had chosen to take a trip to Hell the girl seemed particularly cheerful. Perhaps she was expecting to see an old friend or, something. Her behaviour was deeply perplexing and Castiel chose a tight smile and a nod at her comment regarding Lucifer. This was starting to feel like a very, very bad idea indeed, though it was always possible one of his minions had stolen the girl's - what was the term the Winchesters used... ah yes - meat suit and taken the ride with him. The angel hoped, very much, that it wasn't the case, though he was keeping the observation close to his chest for now, at least.
The heat that hit Castiel when the Doors to Hell opened was unsettling. To think that both his Earth-bound friends had endured such extreme temperatures during their exiles hurt his very soul a little. At least he had brought Dean back, which was little relief, given all he had endured.
This was probably not the right time to ruminate on such matters, knowing that Hell's minions would use any weakness to wear him down and keep him here. It would feed into Crowley's plans all too well to have an angel's soul to control and Castiel would never give him that kind of satisfaction.
"Your what?" The angel looked over at the girl once more, in the cold light of Hell she was different than she'd appeared previously. "I am Castiel, Angel of the Lord," he pronounced carefully, "and you are the one that is dead. Take me to Him, I am here seeking answers," he said meeting her gaze solidly and unblinkingly.