Lightning is main protagonist of the Final Fantasy XIII trilogy and the second main female protagonist in the history of the franchise. Having lost both of her parents by the age of fifteen, Claire Farron sought to become an adult as quickly as possible in order to take care of her younger sister, Serah. To this end she joined the Guardian Corps, rising to the rank of Sergeant and adopting the moniker "Lightning". She eventually lost sight of her goal, becoming increasingly embroiled in her work and not spending enough time with Serah, much to the latter's frustration. The main story begins when Serah is chosen as a Pulse L'Cie, causing her falling out with Lightning as the latter didn't believe her at first, but later realized that Serah was telling the truth and thus was a victim of Bodhum's Purge, a systematic destruction of all influences of Pulse. Joining with a man named Sazh Katzroy, whose son was caught in a similar situation, she seeks to rescue her sister and eventually save all of the world after being branded as a L'Cie herself.