Courtney Whitmore, known as Stargirl, is a spirited and determined young superhero from DC Comics. She is famous for her role as the main character in the series 'Stargirl.' After discovering the Cosmic Staff, Courtney takes on the mantle of Stargirl, balancing her life as a high school student and a superhero. She is a member of the Justice Society of America, where she fights against villains with her courage and optimism. Courtney's character is a symbol of hope and inspiration for younger generations.