Lenne is what we call a classical female archetype. But she's not your usual damsel in distress: she actually saves the world twice instead of being saved, and it's not like she got anything out of both occasions. It amuses me that damsel in distress is often spoken with a negative connotation these days: what's so bad about getting protection from others when you can offer so much more in return?
In a society of rapid development -- whether it be Spira or our own, freedom of pace must be given to its people as they cope with new conditions of life before stability is achieved and eventually sustained. As much as people are encouraged to challenge the status quo in a modern society, we need just as many individuals to keep old traditions in place for worldly balance. Lenne's character represents exactly that in FFX-2: happiness can always be achieved both ways because no nation can be built without stones of the past.