Anna Fitzgerald is a fictional character from the novel "My Sister's Keeper" by Jodi Picoult. She is a 13-year-old girl who was conceived through in vitro fertilization to be a genetic match for her older sister, Kate, who suffers from leukemia. Anna's life revolves around medical procedures and treatments to help Kate, leading her to question her own identity and autonomy. As the story unfolds, Anna decides to take legal action against her parents for medical emancipation, seeking control over her own body. This decision highlights themes of family dynamics, ethical dilemmas, and the complexities of love and sacrifice within the context of illness.