Nana Komatsu, often referred to as 'Hachi' for her puppy-like devotion and enthusiasm, is a central character in the anime and manga series 'Nana'. She is a cheerful and optimistic young woman who moves to Tokyo to be with her boyfriend and pursue a more exciting life. Her journey leads her to meet Nana Osaki, with whom she forms a deep bond. Throughout the series, Nana Komatsu's character evolves as she faces love, heartbreak, and the challenges of adulthood, serving as a relatable figure for viewers navigating their own transitions.