Janie's grandmother is a typical slave who shows the thoughts and fears of average people of that era. Nanny values wealth and security more than anything else, that’s why she likes the idea of getting married on rich Logan Killicks. She sees that Janie’s first victory is that she feels free and can escape from the grandmother’s influence to find her way of life. Nanny’s experience as a slave stamped her worldview with a strong concern for financial security, respectability, and upward mobility. These values clash with Janie’s independence and desire to experience the world, though Janie comes to respect Nanny’s values and decisions as well intended.
Nanny Crawford in the Essays