I am Caius.
I was born a Hunter in the end of time, life could not be brought back into this desolate world anymore, the War of Transgression caused this, Cocoon fell from the sky and plummeted into Gran Pulse, I was changed one day when fighting a Guardian of the Seeress Yuel, I was defeated, bested by the Guardian. The event was the Catalyst that made me eternal, the Seeress was defenseless and a Fiend took that chance and launched an attack, the Guardian rushed to defend Yuel but died, if he was prepared and saw the beast approaching then he would of lived, but my need to challenge him lead to his death. Unable to forgive myself I launched a destructive blast that costed my life, but in turn I had slayed the beast. Etro, Goddess of Death, was watching and saw my final act.
Etro revived me and bestowed upon me the Heart of Chaos, her very heart. Doing so allowed me to never die, I had attained immortality and was charged with protecting all the Yuels that would die and be reborn, I noticed how every Yuel was different, one loved flowers, one loved to sing and another loved to dance. They look the same but each with a bright soul inside. Born to see the future but always died before experiencing it. I did not understand it, why do I have to protect her when she only dies in the end, it was cruel. Finally, I snapped, and set out to break the cycle and kill Etro, it was the only way I could free Yuel that I knew of.
I clashed with Noel and this girl named Serah, Noel was here? Everywhere I went on my quest he was there stopping me! Does he not understand that Yuel must be freed and can only be free by the Goddess's death? Cocoon must fall, and Etro must die. I thought that if I could cause Cocoon to crash into earth before the War of Transgression that all the souls of the dead would overflood Valhalla, it was all I had to know.
Noel, a Hunter born at the end time like me, he was a friend of Yuel, I trained him with tests to prove his strength and see if he had what it takes to kill me and take over as Guardian and Protector of Yuel, I was hoping he could end this for me. But when he found out the last test was to challenge me and kill me, he fled away. I soon realized, he quest was to stop me!? And the girl he was with, was the sister of the Warrior Goddess, Lightning. But she was like Yuel and could see the future, stopping me was slowly cutting her life shorter.
Finally, on the shores of Valhalla I was slain by Noel, he had passed his final test but I soon realized, by stabbing the Heart of Etro and killing me, he had also just killed Etro, I now reside inside the Temple of Etro...forever cursed once more, following Etro's death, the Unseen Chaos flooded from Valhalla and into the Human World, stopping the birth of others, Life could no longer be born but yet, people could not die of old age, only deaths like being slain by monsters or of sickness. That went on for over 2,000 years.
I was greeted by Lightning who was the new Savior of Souls molded by the God of Light who was looking for a new Goddess of Death to take Etro's place. She offered for me and Yuel to be taken to the new Eden that the God of Light was making but how? There was no place for me and Yuel to be welcomed. To prove how useless it would be, I impaled myself and was instantly reborn. All the souls of the Yuel were a contradiction to one another. Some begged Lightning to bring me peace, but others said they could not live without me and so, when one Yuel begged for my release, another begged for me to stay. I, once again, could never die. I now choose to stay in this stagnated world as to atone for my one cruel sin....and it's here, that I remain.