She'd never been worried. Not for a second, not while she had him there with her. She felt safe with Castiel but the things she and Sam could do together, the people they went after. Castiel wouldn't.
She tilted her head and looked over at the demon more than a little amused at the idea. Her knife was already in her hand as she stared at the creep.
"Good to me isn't he" she said stepping forward twirling the knife as she did. She moved in close to the guy still held in a grip by Sam and slid the weapon slowly across the scales watching sparks fly from his skin, same effect apparently. That was interesting. And she did know what she was doing, she'd learned well after all.
"There really is nothing as sad as people like you"
Shallow cuts give way to an unexpected deep one, it was too easy, she'd always remember how this went, always be able to fall back into the habit, but this in itself was a test. Would Sam care that she did this to a demon.
She leaned in as she pressed the cut deep.
"You should be honoured its him that'll end you. You should be grateful." she told the demon her voice low as he finally gave in and screamed. She stepped back pleased.