Hidden cutscene on Farplane:

“Been a while, sis. It’s been seven years, but you still look the same. Geez, I’m older than you, now! I guess it makes sense. Hey, I…I brought you something! Check this out!
Uh…Eh… ‘ere we are! (Fishes sphere out of pocket)
See? She looks just like you! Her name’s “Yuna.” Boy was I surprised the first time I saw her! Ah, ‘course she’s not as good as you. If you were still alive, I bet you’d fight just like her. It’s okay. Yuna will beat Sin for you, I know it. So, don’t you worry. Okay, sis? See you.”