He catches the warm expression and is surprised by it until he watches it evaporate into cautiousness. Clearly Roxas had mistaken him for someone else at first too, and he can guess who. But now he definitely knows exactly who Riku is. He can't even blame Roxas for the caution or his briskness.

Inclining his head to the side, he gives the other boy a half nod in greeting.

"I passed the Mastery Exam. Yen Sid asked me to bring Kairi to him for training." He doesn't know whether any of that would mean anything to Roxas, but he also doesn't feel the need to keep anything from him either.