Unfortunately for Lea, his next fire attack was aimed at one of the illusions Sora created, rather than actually at himself. So Sora was able to easily avoid it, and jumped off to the side. That shout from Lea was not at all unlike ones from Axel when fighting the horde of Nobodies, and it was a bit jarring for him.

Sora decided to retaliate with what he'd discovered was best attack. He brought up all of his happiest memories; all the thoughts of his friends and the great fun they had together, and channeled that into his attack. With that feeling of happiness and friendship powering him, he charged at Lea in a full-body attack.