@Andromeda Bahamut Fury was an alternate form of Bahamut's that appeared in Crisis Core. In more ways than one, Bahamut Fury was more powerful than the original. Also, did Doga and Unei WITNESS Xande's death? No, they didn't, as they're clones who were created later on. They're merely relaying what they were told regarding events that happened hundreds, maybe even thousands, of years ago. Some details are bound to be altered a bit. Check my standards of validity.