Who is Lady Barbara Hornblower from Lord Hornblower and what is their importance?

Lady Barbara Hornblower née Wellesley is Hornblower's second wife. She comes from an established, respected, and powerful British family, and she has spent considerable time in India. Barbara has known Hornblower for years. They were both previously married and widowed. She is described as attractive but not overly pretty. Barbara is said to have brilliant white teeth, long fingers, and a highly arched nose, as well as a willowy, graceful figure. Highly educated, she demonstrates a natural intelligence and a gift for putting others at ease.