Lady certainly didn't expect to see such a sight from Fallon.
Even though she just met him, she could already tell that he was one of a kind. Every emotion he shows seems genuine, and each of his actions has meaning – or at least, according to her impression of him. So, when she heard him laugh out loud for the first time, she could already tell that it was a rare, precious thing.
And that holds a lot more weight as Lady thinks about the fate that awaits Fallon in the story.
"You should do that more often from now on," she found herself blurting out after a brief pause on her part, making him snap out of his moment of mirth and turn to look at her.
"Do what?" he asked with a raised brow.
"Laugh. I'm getting the feeling that you don't do it that much."