Starting with Yuna, because she's the one I haven't done before.

-She doesn't actually know Tidus's name---okay no. She does. It's just more romantic not to say it, to communicate with her eyes.

-She had a brief stint as Besaid Island's veterinarian before disappearing inside the temple for summoner training. The local pets were the first ones to receive her healing magic. To this day, she still wants to help injured animals---but the people have always been her first priority.

-If the group's traveling fairly slowly, she'll stop to send fiends (the monsters are actually mutated dead people with unfinished business) after every battle. She feels it's only right to give them peace.

-She was an awkward child when learning the 'summoners must always smile for the people' thing. Her first days of practice consisted of laughing loudly and inappropriately (like that one famous scene) at Wakka's jokes.

-Her aeons are trusted sources of comfort. She sends little prayers to the fayth every night, almost like a conversation between them. After every battle in which they're summoned, they get hugs before leaving. Touching them feels like a warm, pleasant tingle.

-Being half Al Bhed, she's always expressed an interest in forbidden machina. As a proper Yevonite summoner she can't openly walk up to machines, but without the eyes of Yevon on her...expect her to be excited to learn about microwaves. I'd also like to explain how she learned to trust guns at one point.

Ask any questions of her too!