"Huh?" Sora blinked at the man before he realized that the man was making assumptions, just like everyone else always did. He sighed. "Don't worry, I did a lot of fighting before I came here, too. I'm used to it, and I can take care of myself. It's just a little harder here because the Keyblade doesn't work as well."

While he almost continued to point out that he was fifteen and therefore not a kid, that argument never worked with anyone. People usually didn't believe that he was any good at fighting until they saw it firsthand, but he could always try. It was better than just letting the comment slide.