Originally posted by Hedgy
I first noticed Yuna's eyes, in one of the early "cut scenes" i.e. when the group are holding a conversation.
I thought I was mistaken, but the more attention I paid, in these scenes, made me realise I was right.

With Rikku's eyes, there is a close-up of her, when she joins the party. There was no mistaking her eyes!
I meant when do you find out that she's (SPOILER)half Al-Bhed.