I would think...that all of our flaws and quirks make us unique. [She smiles shyly.] I think I rather like being imperfect.

[She pauses, and winces when he says she would 'throw her life away'.] Oh its...it's not like that at all. It isn't a waste, it's...it's the only way to defeat Sin, and bring the Calm. [She pauses at his next question, then shakes her head.]

We don't know what caused the war to begin, only that it did begin and end, and it ended with the creation of Sin which has caused so much death and sorrow for the past 1000 years.