Oh...he smiled! She was suggestible enough to smile right back after a moment, even if she was still tired and worn down from healing him. If he wanted to be friends, then she'd happily be friends, even if he was technically a senpai.

Her expression grew more serious again though, once he started speaking. "That's true, but...this isn't a battlefield. And the best way to build a chakra pool is to push your limits and try harder! So as long as I practice now while it's safe, it's better, right?"