Ah, jeez. What should she do? She didn't want to upset him, but it's not like it would be good to push him away either, right?

And she honestly can't help being touched, that he was so concerned in the first place. Even though nothing happened in the end!

Kyoko's smile softens into something gentler, and warmer. "... I didn't want to make you worry about me, but... thanks. For worrying. It was scary for sure, but scaring me was all it did in the end, so... don't be too troubled about it."