So another person with powers. Castiel still wasn't satisfied by the answer, but he'd seen enough things in this City to figure that he probably wouldn't get it, even if he continued probing the man. And he could sense the growing animosity in the other being.
He nodded ever so slightly. "I see," he said. "Very well."
Having got as much of an answer as he could, and needed, the angel turned, pausing as one of the men groaned slightly and started to stand up. Calmly, and with no more effort than swatting a fly, Cas back handed him, sending him tumbling a few feet, once more unconscious.
Then the angel turned, walking calmly to the side of the building.
"Devils rarely have horns, in actuality," he said, standing at the edge of the rooftop. "There are many demons with them, but not devils, unless they cross breed. And Lucifer's true form is nothing monstrous." Lucifer was, after all, his brother. An angel with a form as beautiful as it was great and terrible. "You're brave to fight in darkness. It's good that you defend the weak. There are others in this place that bear more true to your name, and should be fought."