Sorry, everyone. I just think those names should be for Japan only. I don't know about "Riku", but "Sora" and Kairi" sound a bit American to me. Maybe we can leave Riku Japanese, as I could figure that he's at least half-Japanese, but Sora and Kairi look more American to me. We pronounce the names in an Anglicized manner, meaning that we take a name from another language and make it an English name. When you anglicize a word, it becomes English. I learned that from Wikipedia. So maybe we CAN give Riku a Japanese last name, assuming that he is half-Japanese, but "Sora" and "Kairi" sound more American to me. When you give a Japanese last name, though, don't make it sound too Japanese. It has to be a name that Americans can understand.
