Nana Osaki is one of the main characters in the anime and manga series 'Nana.' She is a punk rock singer with a fierce and independent personality. Nana dreams of making it big in the music industry and is the lead vocalist of the band Black Stones (Blast). Despite her tough exterior, she harbors a sensitive side, influenced by her troubled past and romantic entanglements. Throughout the series, her friendship with Nana Komatsu becomes a central theme, highlighting themes of love, ambition, and the struggles of young adulthood.