[Oona pauses, blinking slowly as she takes in his reaction. Her eyes go from him, to the knife, then back again. She's pretty good at reading body language--and she's a predator by nature. It isn't hard to notice it regardless of how much he's trying to hide it.]

Are you nervous? Is it the knife? ...Hm, no, you would not carry it if you were frightened of it... Are you worried I will hurt you, even if on accident?

[She angles the knife point away from him as she speaks, wondering if that will help a little.]

I have been learning how to wield knives and things. I will not hurt you-- Or, no, I can not promise that when accidents happen. I will not hurt you on purpose. [There, amended.]