The looks the staff gave her made sense, then. Wariness grew into alarm, and, in some cases, fear. Killing another person cast a shadow on one's aura, as did torture. She didn't suppose her aura had been particularly light before, but now a line had been crossed. She carried it in her magic and the way she held herself, and it was easily visible to those who knew how to look for it. Those who didn't know still felt a sense of unexplained unease. Harry and Ron, as always, were oblivious. Most everyone else subconsciously avoided her.