[He shakes his head no; sadly, he hasn't seen them, and doesn't expect to in the future, but... he'll take the opportunity to talk about them anyway. It's nice to remember the few good things he had; same as here, the people are what were most important to him in Aefenglom.]

They were both way too good to me. The first time I met Yona, I was ready to give up and let a monster attack me, but she told me to get up and refused to leave me. [He sighs.] And Rikku... she immediately took my hand to help me get settled in, and—well, there was something there where we had to have a magical bond with someone, to keep ourselves safe. She didn't hesitate to offer even though we'd just met.

[To answer the initial question, though:]

But the two who are here are Sora and Vanitas. They're... very different. From each other, I mean. [Despite looking nearly identical.]