Claire Farron, primarily known by her codename 'Lightning', is the central protagonist of the 'Final Fantasy XIII' series. She is a determined and stoic individual who initially isolates herself from others, focusing solely on her mission to save her sister, Serah. Throughout the series, Lightning evolves from a lone warrior into a compassionate leader who learns to trust and rely on her companions. Her character embodies themes of growth, redemption, and the power of hope in the face of adversity. Lightning's journey is pivotal to the storyline's progression, making her one of the most iconic figures in the 'Final Fantasy' universe.