[Castiel doesn't know why Gabriel decided to follow him around. Just for a little bit-- Castiel was simply taking tally of how many mice he found dead and drained; but there was his brother.] [And there was another mouse. Castiel crouched down, tipping his head down to make sure this one was another one of Lilith's catches. The back of his neck is exposed, Gabriel, curl of hair, and-- scars?]