[Unfortunately for Isa, Lea doesn't look nearly as happy to see him, his expression defensive, not unlike when Isa/Siax had last visited him in Twilight Town before the final battle.

And someone doesn't really want to admit that he's on such a mundane, boring errand, so he ignores the first part of Isa's reply to focus on the second.]

And when did we promise that, exactly? Last time I saw you, you were still one of Xehanort's cronies and were trying to stop me from rescuing Sora!

[Yes, logically he knew it was probably another issue with crossing timelines, but at the moment, he doesn't much care.]