I hated it when Sora said that :\ First of all, killing Demyx wasn't a nice thing to do. Demyx didn't even want to fight him. And second, that was a really proud thing to say. Sora sora I amdisappoint.
I knowwwww. I wanted to go through the screen and slap him. D: I really don't get it though. He's supposed to be this caring, compassionate kid, who'll risk his life for people he's just met, but he can kill this poor guy who never personally did anything to him and not feel a shred of remorse for it. :/