Sans-Serifs's a tad shorter than they are, though definitely larger than the usual cat. "Oh. A robot's a machine. Made of metal that can move around and do stuff on its own. Mettaton's a he, though. Looks sort of like a shiny human usually, or a box on a wheel."

Excellent. Frisk brings their hands together in a gentle clap. "Thank you, Duchess. He needs a lot of niceness, and you're very nice, and to learn a lot. He's still just a kid."