There's no hint of pomposity which the word can sometimes suggest. I'm thinking of the word in its most ancient sense.
Dignity means a sense of one's proper self-worth.
The mystics of the Middle Ages tell us that a human being has only two tasks. The first is to appreciate his or own inalienable dignity. It is an awesome and holy thing to be alive and to be aware. Life is a gift and our natural response is gratitude. Jane is, whether she is aware of it or not, an icon of this deep kind of dignity.