He'll sit here quietly as long as she needs him to, providing a shoulder to lean on. He wonders what's going on in her head, but... she'll tell him when she's ready. Or if she's not ready in a week or two, he'll start trying to pry it out of her.

Normally he doesn't like to squeeze answers from people, but he honestly believes that Kaoru will need to talk about it. And he believes he should hear it, given how much time they spend together and because he's her student. He can't help but think that something in her teaching style might change due to her experience on her first mission, so in that light, it's almost imperative that he find out before too long.

Also, she's his friend. He's leaned on her in the past, so he'd like her to be able to lean on him. Metaphorically, because she was managing that quite well literally.