Catching a glimpse of the hand out of the corner of his eye, he stops, and turns to look back at Fuu in mild confusion.

"Why wouldn't it be? We are friends, aren't we?"

It doesn't make sense to him. Why would friends be that formal with each other? Unless...it's something having to do with the way things are where she's from.

"I mean," he says, sounding slightly uncertain, "Ye don't call your friends by their last names where you're from, do ye?"