In "The Immortal Life of Henrietta Lacks," a character named Lillian is described as having light skin, even lighter than her mother's. This physical trait allowed her to assimilate into a different cultural identity. Her brother Gary reveals that Lillian married a Puerto Rican man in New York, which played a significant part in her decision to embrace that identity over her own African American heritage.

Gladys, another character, holds a letter that signifies Lillian's transformation and rejection of her black identity. The narrative highlights the complexities of race and identity, suggesting that Lillian chose to convert to Puerto Rican, distancing herself from her roots due to societal pressures and personal choices. This decision reflects the broader themes of racial identity explored in the book.