Caius Ballad

Lives he appears with Yeul in the village of Oerba. Caius Ballad is a former l'Cie and the immortal Guardian of the seeress, Yeul.

Everything this man has done for the past several centuries has been for the purpose of freeing his charge from her curse of eternal reincarnation. If he can kill the goddess and send the artificial Cocoon plummeting into Pulse, the resulting flood of volatile chaos through Etro's gate would shatter the boundary between Valhalla and the mortal realm. Life and death would cease to hold meaning, and Yeul's cruel fate would finally be undone. Or so Caius believes.
He took the name 'Ballad' because of the one battle that nearly killed him.The foe was a fellow warrior of the Farseers. Overwhelmed by the strength and skill of his opponent, Caius was driven back and back, until it was only a matter of time before the final blow would fall. But their duel was interrupted by an enemy attack, and during the ensuing battle Caius's opponent gave his life defending the seeress. Caius believed that it was he who should have fallen in her defense. Thus, to honor the fallen warrior, he took his name. Caius is a tall, slender, muscular man with purple attire, hair and eyes. His long hair is adorned with feathers and tribal beads and is held back with a headband. His form-fitting suit of armor resembles Bahamut, and he wears dark boots lined with white fur. The Etro script on the back of his armor translates to: "Undying Witness of Infinite Fate." It is said the eye on the hilt of his sword is the eidolith capable of summoning Bahamut, an Eidolon gifted by the goddess Etro when he served as a l'Cie.

Caius can perform an incarnate summoning, which allows him to fuse with Bahamut and become Chaos Bahamut. Chaos Bahamut is darker than the regular Bahamut and always has the wings, whereas the regular Bahamut only displays them in Gestalt Mode.Caius is calm and serious, gets emotional rarely, making it difficult to discern his thoughts and intentions.

Caius as someone who prefers to personally take action instead of having others do the dirty work for him, and says he is like "the calm before the storm", as he may remain silent until spotting a weakness in his enemies, and once he does, he will expose it without mercy. He isn't entirely above mocking or praising opponents, either, as he praises Lightning's prowess but also taunts her whenever she fails to push him back.

As his goal draws nearer, Caius becomes emotional, ultimately revealing himself as a man consumed by sorrow and rage over the centuries to the point that he plots to destroy time itself. With a millennium of experience Caius is a warrior of equal prowess to Lightning. Having been made immortal as an act of benevolence from the goddess Etro, he has gained knowledge of every possible scenario in the timeline and uses it to his advantage. As Caius holds the Heart of Chaos, Etro's own heart, he can command the powers of chaos itself, the mysterious energy that flows from the unseen realm that Etro keeps at bay in Valhalla.

As chaos has the power to warp the timeline, Caius manifests time paradoxes in an effort to change the fate of Yeul. He can open portals to immediately move to a different location, and enter Valhalla from the mortal world.