While Daniel told his story Harry focused on the teachers" aura's. McGonnagill seemed to be bright gold and white, same with most of the Professor's only the others had a little darkness. McGonnagill also had an intimidating aura and Harry doubted he'd want to anger her even with Dark Arts. Snape seemed to have much darkness in him and red, hatred if Harry remembered correctly, but he also had a decent amount of gold and white. Carrow was pitch black, as was Harry, with ruby red and amethyst purple blanketing her. If the teachers could see what he could see they would have her fired in a heart beat. It slightly surprised Harry, she seemed to so nice he had forgotten that she was indeed an ex-Death Eater. Lily seemed to be like McGonnagill only she didn't have the intimidating aura.