He nodded once, but stopped as both Sora spoke and as he let go of Lydia.

"Gee, thanks Sora," he said with all the sarcasm he could muster, grinning back. At least before it faded, looking between Lydia and Naminé. He... really needed to talk to the latter once they got back to their house. If he doesn't pass out from exhaustion first, anyway.