Duster stops the petting to give Sparks a long look like he's expecting more to that answer. Normal means something very different to him. At least Mercury is nice, which he can't say the same for whoever did this to him.

"Palitutu's the one who stole a giant weapon, right?" That much he remembered from Tamekichi's lecture. "I was thinking of asking Cid about that. I have some tools I could use and a very important item I have to keep safe."

And back to the petting. When he really thinks about it, this is a great way to cope with living in a large city that doesn't look like a fake, technological utopia.