Yo. I always have to get my two-cents in.
(SPOILER)When Lulu and Tidus and Kimahri rescue Yuna from the Al-Bhed during the Blitzball Tournament, it's mentioned on the boat. Tidus is telling Yuna about meeting the Al-Bheds when he first entered Spira and Yuna asks him if there was a man named Cid on the boat. He says he doesn't know, and when Yuna tells him he's her uncle it's found out about then. Yuna is an Al-Bhed on her mothers side. And since all Al-Bheds have green eyes, she received one green eye from her mother and one blue eye from her father. Hope that helps.
