"I'm not too busy," she smiles, and it looks like an expression she doesn't use a whole lot, but it seems kindly meant.

Frisk wouldn't be the first person to wonder about where the metal arm came from, or where the original flesh-and-blood version went. Furiosa doesn't care for that type of questioning from adults, for the most part, but she'll take it from children. Whether she'd give an honest answer or make something up depends on her mood.

In any case, she shakes hands with the right hand, clasping gently but firmly. "Well met. Did you come here on purpose or by accident? You seem pretty calm about it."