Dean excused himself when Hermione showed up, he needed to not be in close quarters with the feisty witch. Witch! He knew his father was given Sam and he hell for befriending a witch, good or bad. Dean, however, knew Hermione would rather take her own life than hurt someone intentionally. She really was a good person, witch or not. It had taken him a bit to get over the fact she could wield magic like they wielded their weapons. After demanding proof, the petite firecracker had whipped out her wand and had performed several spells. At least Sam and he could enjoy the display of power. Their first meeting hadn’t gone well, at all. As soon as she had said she was a witch, Sam and he had pulled their weapons only for her to stick them to the floor and disarm them with a swish of her stick! It had boggled them and worried Dean until she proved she wasn’t out to hurt them and didn’t need any "damn demon to bargain with in order to do so!"