Ok, so when Ultimecia possessed Edea, you are claiming that they were still fighting Edea, not Ultimecia, since it's Edea's body? I'm sorry, but I believe that the mind is the crux of a person's individuality. The minds of Rinoa and Ultimecia are those of two different people, even if they came to exist in the same body.
I'd appreciate it if you would at least respond to this...