Arthur is listening, but all thought more or less stops when she says her name--which means he misses a majority of her actual request, but that's quite all right, because it's the first bit of this that is actually giving him the hang-up.

"You're Haruno Sakura?" he says, incredulously, nearly as soon as she's finished making her request. Begging? He catches that word at least, and mentally runs over what it is she's asked, what he's distantly absorbed as he stood there staring at her tiny face and trying to work out how it is that the grown Haruno Sakura could have become a child.

Morgana is one thing. She's forgotten her magic; he can accept that, mostly. Perhaps because he wants to. This is different.

This is weird.

"Look, this isn't a joke, is it," he says, suspiciously. "I understand some pretty strange things are happening around here--" The work of sorcery, of course, and his mouth tightens a little-- "but this is a bit much."