In Final Fantasy XIII, Serah is the first Pulse l'Cie in Cocoon, and her destiny is one of the game's central plot points. In Final Fantasy XIII-2, Serah sets off on a journey through time with Noel Kreiss to find Lightning when all others believe her to be dead, a journey that also becomes a quest to save the future. In Lightning Returns: Final Fantasy XIII, saving Serah's soul is Lightning's main motivation when she becomes the savior.