[Though she notices the momentary freeze up... she keeps it to herself, not certain of the reason why beyond the fact that there is definitely something there keeping her from being fully at ease.
And maybe there's not anything Yona can necessarily do about that, but she's glad for the smile Sansa manages in turn, for her spark of excitement. She nods, enthusiastically too.]
That's all right by me! I won't hold you to any sort of promise like that. [Ehehe. She thinks you'll be just fine.] And, oh - I'm sorry, I don't think we were introduced yet... My name is Yona. It's nice to meet you.