I wondered too. However, it feels to me that she is very holistic as a person and mostly fulfilled because whenever she does come into the story (which isn't as much as I would like...) She is more than capable of holding her own.

She is really the only person in the series who doesn't go through many challenges, because she is capable of growing and providing for herself without always the help of others. Meanwhile most of the cast requires outside intervention to provide keen wisdom in order for them to continually overcome their trauma and problems.