Who is Molly from Rabbit-proof Fence and what is their importance?

Molly was the eldest of the three girls who escaped from Moore River Settlement School and found their way home through over one thousand miles of rugged and dangerous Australian terrain. Molly was the daughter of Maude, an Aborigine woman, and an Englishman, Thomas Craig, who was the rabbit-fence inspector. Craig named the girl Molly and remained part of her life. Molly grew up to be a pretty little girl who had light-skin and light brown hair. Like other half-caste Aborigines, Molly was ostracized by the other Aboriginal children. When distant relatives Gracie and Daisy, who were also half-caste, moved to her camp, she was thrilled to finally have friends.