Okay, copying exactly was out of the question. Which left interpretation. That was something Katara could manage. Holding the dao tight enough that it didn't slip from her grasp but not so tightly that her fingers hurt, she did the movement at a level that was comfortable for her. She felt the different immediately and knew that was what he'd been trying to show her. She could just tell it was right.
"Okay," she didn't bother asking how that was. She already knew the answer. "Though, do you really think I'm going to be so close to a demon that these will be necessary?" she asked. There was a hint of skepticism in her tone as she gazed down at the dao, then back to Zuko with a curious expression on her face.