Hmm . . . good question. The Librarian goes stock still, staring blankly at Kol, for a solid minute. They're thinking, of course, but it's also a bit creepy, having that ghostly presence just staring and staring with no eyes at all . . .

But ah . . . they shuffle behind their desk and vanish. There's rattling and rustling from something unknown, items in drawers rattling without being touched, and then silence.

In the dead center of the desk, a rock appears. It's fairly ordinary, except someone's painted a smiling face. Presumably, this is what the Librarian intends to be delivered, because they just straight up do not reappear.