"It's all just a precaution." Garrot's voice is hushed and soothing as he sees how uncomfortable Luka is. And in a few quick steps, the Knight's hand is no longer on the Princess's shoulder, he's undeniably a few feet away, and there's a mean little chuckle. "We both know you can't hurt me, Princess." Garrot's big and tough and they're not using real weapons, so...

"Straighten your body, and punch me in the chest." And then Garrot... scoots forward an inch or two, to make sure that the Princess's fist can make the connection. "No leaning, no shoulder. Just your arm." Learn by doing, Luka. In this case, learn by doing something utterly unrealistic.