[What do they say about phoenixes? She's never seen one before coming here, but...

There's something about life and rebirth. Can something there be said about them?]

Hm... I don't know if this will help you, but if you want something symbolic, maybe you can pick something that involves the idea of rebirth or revival? Maybe something like 'Res?'

[Except when Aerith says it, it's almost like a soft 'Rez.' 'Resurrection' is what she's going for.]