Why exactly did she join the Kyoshi Warriors? What was that supposed to add to her character arc? If anything, it feels like it contradicts her arc and her development. In The Beach we learn that she hated growing up with identical sisters to the point that she would rather be a "circus freak" than being stuck in a matched set. And that's why she joined the circus, to form her own identity and individuality. So why join the Kyoshi Warriors, where she is just another matchstick in a box?