Who is Martha from Lost Boy, Lost Girl: Escaping Civil War in Sudan and what is their importance?

Martha had the traditional Dinka name, Arual. She had a happy childhood and lived in an urban setting, but as war came closer, her family moved in with relatives in the countryside. When her family was attacked, Martha was separated from her parents, and she and her sister found themselves struggling to to survive the arduous journey to a far-away refugee camp. Incorporated into another family, this character spent her growing-up years in refugee camps. She finished her chores quickly so she could attend school in the refugee camp. Instead of marrying at a very young age, she decided to travel to America. Once there, she was adopted into a family and finished her education. Eventually she married another refugee she had met back in her homeland and kept in touch with after she moved to America.