The fan reaction to Final Fantasy X convinced the developers to create a continuing story with Final Fantasy X-2. Costume designer Tsukamoto Tetsu stated that the radical design changes for Yuna reflected a huge cultural change. Script writer Nojima Kazushige added that Yuna’s new outfit was a “natural reaction to the heavy stuff she wore in FFX”. Because Yuna, Rikku, and Paine lived in a more carefree world in X-2, the designers wanted them to be able to dress up, a feature which became key to the gameplay.
She’s such a cute Yuna! But I wonder, isn’t this Saya? I’m not entirely sure though, but thanks to Pika-chan for sending this in!