Nettie is a character from the novel "The Color Purple" by Alice Walker. She serves as the sister of the protagonist, Celie, and plays a significant role in the story. Nettie is portrayed as a strong and caring individual who seeks to protect her sister and provide support throughout their struggles. In the narrative, Nettie becomes a missionary in Africa, where she writes letters to Celie, sharing her experiences and observations. These letters serve as a crucial connection between the sisters, highlighting themes of love, resilience, and the search for identity in a challenging world.