Quote Originally Posted by Takara
I don't think Rinoa's and Ultimecia's hair look similar at all. Not only it's not the same colour, but Ulty has a widow's peak if I recall well, and Rinoa's hairline looks quite different.

Granted, she COULD have changed her appearance, but even there, just because they look similar does not mean that R=U.

Well let's look at Edea, Ultimecia did possess her and when Rinoa tried to give Edea the thing the Dr. Odine made, Edea instantly changed the length of her hair. Which means that sorceresses can possibly change their apperence but wouldn't waste their time doing that.