Nana Oosaki is one of the main protagonists in the anime and manga series 'Nana' by Ai Yazawa. She is a talented punk rock singer with a tough exterior, known for her distinctive style and strong will. Despite her fierce personality, Nana is deeply caring and loyal to her friends, especially her bandmates in Black Stones and her close friend Nana Komatsu. Throughout the series, she navigates love, ambition, and friendship while struggling with her turbulent past and dreams of stardom.