Merlin knew he had come to admire Hermione more than he really ought to, especially with the situation they were in. He knew it would have been wrong for him to take advantage of her in the wildly uncontrollably emotional state she was in. She was so stubborn and intent upon having her revenge that it scared him a little. He would not want to be Greyback on a regular day, let alone the day Hermione Granger hunted him down and had her revenge upon him.