Savior Savior is the name given to a warrior chosen by Bhunivelze to usher in the new world in " " . According to a prophecy stored in an Oracle Drive , the savior is a harbinger of doom who will attempt to destroy the world , and that a hero will rise up to prevent the savior from performing their task . Datalog . " Scripture tells believers that a savior will appear at the end of the world to do God ' s bidding and save the souls of the people . " " When the day of salvation comes , all life will end . The souls of those chosen by Bhunivelze will be saved and reborn in the new world . The one who is tasked with delivering them is known as the savior . " " In this sense , the savior also heralds the coming of the end . For the heretics who do not believe the teachings of the Order , or the promise of a new world , she is thought to be little more than a harbinger of destruction . " Story . The savior is a figure of legend : a woman with rose - colored hair chosen by Bhunivelze to free burdened souls and guide them to a prosperous new world . But the savior ' s true purpose is to gather souls for Bhunivelze so he can purge them of their past selves and allow them to live in eternal bliss . Lightning is chosen to be the savior , accepting the task primarily to save her sister Serah ' s soul , secretly stolen from her by Bhunivelze while she was sleeping . Serah ' s heart now resides inside Lumina , the manifestation of Lightning ' s vulnerable side . She is also chosen because she has the potential to become his new , emotionless version of the Goddess Etro , keeping the balance of the universe while Bhunivelze rules the new world . There exists a prophecy in a surviving Oracle Drive which states the savior will destroy the world and its people , rather than save them . Noel Kreiss has become obsessed with the prophecy , intending to kill the savior and ensure the prophecy comes to pass . There exists a group known as the Children of Etro who rebels against the Order , who worship Bhunivelze ; to ensure the failure of the savior ' s mission , the cult intends to kill anyone who could be her and thus Lightning is brought into conflict with the Children of Etro and Noel , both of whom want her dead . She also ends up fighting Snow Villiers , who wishes to die as a punishment for failing to protect Serah . During her quest to help Snow in Yusnaan , Lighting performs the role of the savior in a play called " The Song of the Savior " . When Lightning and Bhunivelze finally come face - to - face , Lightning rebels against her assigned role upon having learned Bhunivelze ' s vision for mankind is little else than slavery . She decides to save humanity and create a world free of gods . Lightning and her allies break Bhunivelze ' s hold on the world , then together they fell the god before witnessing the creation of a new world where humans can determine their own destiny . Despite Bhunivelze ' s hidden agenda , Lightning ended up fulfilling the legend : freeing the souls of humanity from their burdens and leading them to a new world . Musical themes . The term has the eponymous theme titled " Savior of Souls " . Composed by Naoshi Mizuta , it is modeled after " Blinded By Light " , and made with classical and electronic elements . It serves as one of the many battle theme s in the game , appearing most frequently in the Wildlands . " Savior of Souls " act as the Event Music Sequence for " Lightning Returns : Final Fantasy XIII " in " Theatrhythm Final Fantasy Curtain Call " . " The Savior ' s Words " is another song associated with the Savior . It was composed by Mitsuto Suzuki and performed by Wollny Andreas .