Oh Hooper would be the most hated Gryffindor in Slytherin house, but Katherine on the other hand immediately saw the perks. If Professor Black was doing the hexing, she'd see more of him. A lot more. She definitely liked the sound of that.
She didn't ask if he really thought they'd ever face a Death Eater, because the way things were going it wasn't impossible even if she did think her father paranoid for constantly talking about defence in his letters. Now she saw the point. It meant she knew more around Professor Black.
"You'll train us?" she asked with a smile and she didn't give a damn about Professor Werewolf, but she did care about her NEWTs. She'd definitely get an O. "So what can I do to prepare? Are there any good theoretical books or should I focus on practical lessons?"