Who is Marina Thwaite from The Emperor's Children and what is their importance?

Marina Thwaite, a former model and author, is now in her late twenties. She is described as wealthy and beautiful, and has recently moved back in with her parents. Her boyfriend dumped her for a younger woman, her novel is unfinished, and her life is unsettled. Over the course of the novel, Marina will become involved in a serious relationship and finish her book.