Who is Vanessa Fuller from Don't Let's Go to the Dogs Tonight: An African Childhood and what is their importance?

Vanessa Fuller is Alexandra's older sister is a beautiful blond with voluptuous lips nicknamed Van. She is much more artistic than Bobo, and spends most of her youth reading and drawing. Van eventually attends secretarial school and marries when she becomes pregnant. She settles in Africa near her parents with her second husband and four children.