It took every ounce of her will power not to grin at the withering look he'd given Luke. She was sure many cowered at such a gaze, but she'd never found herself intimidated by Kylo. She was unsure why. It was definitely amusing to see him try to intimidate Luke, though.
That amusement melted when he handed her his slightly soiled cloth. She took it with a nod, and wiped what she could from beneath her nostrils, with little worry of getting grease on her from it. Sure that the flow had been stemmed. "Thank you." She did take a clean corner and dab at her ears just in case.
Once she felt as clean as she could be without a bathing she stuck the rag into her pocket. "I had to. You needed me to. To ascend you can't kill him. I had to keep you from descending." She glanced back at Luke.