"Frisk. Cool." Weird name, but Dipper can't really judge. He vaguely wonders if Frisk is a girl or a boy, but he doesn't know of any not weird way to ask that so he just... hopes he won't have to use pronouns for any reason. He shakes their hand and then gives an awkward half shrug.

"I'd say welcome to Wonderland, but it's hard to feel all that welcome when you've been taken somewhere against your will. Some parts of it are pretty cool, though! And other parts... really, really suck." He can never decide whether he loves Wonderland or hates it. The mysteries are awesome. The twelve forever part is hell. "But... what do you know? Has anyone given you the rundown yet?"