Cosima almost commented that his name sounded biblical but bit her tongue there, figuring that he must hear that a lot. She took a step closer to him, then stopped to take a breath. She could feel the beginnings of a tickle at the back of her throat and tried her best to contain it. The last thing that she needed right now was to have a coughing fit (especially when she didn't know where she was).
Castiel had certain peculiarities about him, but Cosima was nothing but an optimistic person who tried to see the best in everyone. As she listened to him she came to a few quick conclusions. He didn't know precisely what was going on, but he was in the same boat (or spaceship) that she was, and had at least been here for some time before her arrival. "Do you know how long you've been here? If you don't mind me asking."