[ It isn't bravery. Lucifer notices the tension, but that's only because he held on a little tighter to ensure that Crane didn't jerk his wrist and get himself hurt in the process. He kept hold when he was done, to answer the question. ]

Oh, it's nothing. I just signed on the dotted line. My commitment to your cause, in writing.

[ And sure enough, that was what he'd done: he'd left a mark there, not on the skin, not even underneath it, but on one of the fingerbones of Crane's left hand, where only an X-Ray could pick it up; his own sigil and seal, like a signature, where noone else would think to put one. He ran his thumb across the spot, so that the symbol brightened through the flesh, glowing bright enough to see, and drew his hand away so that Crane could watch as it faded. ]

I protect my assets, Jonathan, where it serves us both for me to do so.