Daud gives the most minuscule hint of interest, and Frisk lights up, pouncing on it.

"Yes! There's Sans, he's inna blue hoodie, he's kinda lazy and does stupid stuff, sometimes but he's really cool actually, an' the oldest. There's Papyrus--there's two of him actually, but one of them's a lot more nervous, and he's my--he's family too, really young, a baby almost, but he's taller'n me. Serif's a baby too, an' taller than me too, but just a little! He looks sorta like Sans, but he doesn't have the same clothes."

That...was a gigantic ramble, coming from Frisk. Even they look surprised about it after the fact.