Originally Posted by
Wolf Kanno
Not true, DiZ only removed Roxas' memories of his time as a member of Organization XIII. KHII states many times in his flashback that Roxas didn't have any memories of being Sora. He even got frustrated with Riku when he kept calling him by the name of Sora. Though it is interesting that Xemnas seemed to know who Roxas was the Nobody of.
I didn't say
all of his memories. It is clear that even though he didn't know who his true nature was, it was enough to illicit a strong reaction from him; he had to have known something. Furthermore, if he didn't truly know anything at all, there would be no reason for him to join OXIII, and there would have been no inclination to. He can stay perfectly ignorant, but, that didn't happen, so he had to have known something and wanted to know more.
His frustration with Riku probably came as a result of the natural Nobody disposition to always be pissed, and for Riku challenging his identity. I would be pissed if someone said that who I was did not matter.