[ @pyrocicle liked for a starter ! ]
"Umm, hey there!" A bright-eyed child raises their voice for attention, clasping Dove's Sketchbook in one arm and giving a friendly wave with the other. Their animated expression doesn't seem to fit into the bleak Underfell surroundings.
Who knows how they got it: maybe they had slipped it from her with deft fingers, or simply turned up at the right time when she wasn't around and had left it out- a situation like that wasn't at all unlikely, given how prone they were to appear in the thick of things. Either way, they had run off with what looked like a valuable looking book, only to find out with much disappointment, that this book was filled with meaningless scribbles that they didn't understand.
"I think you may have lost this. I was just taking a peek through it, and... is it in a secret language? I don't get it."