[He notices that surge into her wind ball. Hm.]

Then all that's left for you I suppose is to master the technique, rather than both that and the power put into it. [That's good, that will be very, very helpful for her later, he figures.]

Does it truly matter that he's gone? I mean to say is that going to hinder you in battle? [Honestly he knows what it is to lose someone to being sent home, so he feels that can go unsaid.]