A response! She's delighted, and smiles for it, her own voice at a lower volume because this is a library after all.

"I thought I heard someone nearby and wanted to check - don't mind me, then. I'm just reading."

It is still some odd sound, the clawing and that breeze, but there are enough nonhuman people about that anything beyond pleasantries is simple rudeness. Her hands hold nothing but her book, and her attitude lacks any sharp edges. He's safe, if he chooses to simply sit and exist, because there's no reason for her to act out against a stranger.