"I..." turned small, forgot who I was, forgot my friends and family, miss mama for the first time "...I'm kinda tired," they say with a ducked head and shrug. Ignore that, it's time for actually-important information now.

Tap-tap-tap, they pace around him and offer an arm. If he wants to try. He might pull them down instead, but that doesn't occur to them. "No. There's...goat-monsters kinda human shaped, or ones that look goopy, and robots. I think. Right now. Sometimes people disappear, sometimes they come back. Dunno why or when. Um, there's a giant diamond--she's not a real monster, but stay away from her."

What are they forgetting? A lot of things--

"Name's Frisk," they add. That isn't the most important thing, but it might make things confusing later.