Kaguya's Bio (Both the person and the Ultimate Aeon)
Origin: Bevelle
As the person:
Kaguya is an enchantingly beautiful woman who once followed the teachings of Yevon. Every time she goes to the temple to pray for many things: her friends and family, the maesters, the summoners, the guardians, and the Crusaders. She prays for the people around her, except herself. Kaguya only values what she has learned from the teachings and for atoning for any sins that have been done, even those she never committed. And then, he came. A warrior monk who followed the teachings as much as she does comes into her life. Due to their similar interests and values, they got along quickly and became great friends. Their friendship was something that they cherished the most, and they started to become more attracted to each other. One night, the monk came to her home and told her that one day, he was going to become a guardian for a well-known summoner. They start to realize that they had feelings for each other and instantly, without telling one another, they started to share a night of passion that they will never forget. Thanks to that, she became pregnant with the monk's child. The monk wants to be a good father to the unborn child, but feels that the kid will be better off without him. Believing that he is not willing to take responsibility, she became bitterly angry with almost everything around her, hoping that the teachings could help her. But no such help could be found, and then it came: she gave birth to the child, naming him Byakko, hoping that someday her son would do great things.
As the Ultimate Aeon:
Due to prior events, Kaguya became a fayth and produces an aeon far more powerful than any aeon, which could be a match even for Sin. At first, they were about to use this "Ultimate Aeon" as the final summon that could destroy Sin, maybe even for good. But there was one problem, due to the anger that was within the fayth the aeon itself was far too powerful for any summoner to control, not even the maesters would dare to try to control this being. If a summoner tried to summon it, he/she will be instantly killed by the aeon. And so they hid the fayth in a remote area known to them now as the Temple of the Unknown Fayth deep in the Omega Ruins. As for the aeon itself, they decided to seal it within a growing baby boy, Byakko, who could be destined to become the greatest of all maesters. For years, the aeon and the fayth became dormant until years later; an extreme surge of anger from Byakko reawakened the fayth, therefore awakening the aeon within him. Byakko, combined the aeon's immense strength, becomes a force to be reckoned with. Only Umira, the one person he loved most, could stop him from the rampage of destruction he could have caused. After the escape from Bevelle, he learns about the aeon and names it after his mother, Kaguya.
Unique Attacks:
Sword of Light – Creates a sword of light energy and slashes at an enemy.
Moon Shine – Like Valefor's Sonic Wings attack, except the wings shoot out a small storm of energy blades at an enemy.
Multi-Pain – Like Anima's Pain attack, except multiple blasts are shot at random enemies.
Eclipse – Like Bahumet's Impulse attack, except they are spheres of holy magic.
Overdrive: Holy Wrath – Summon spheres of white energy and surrounds all the enemies with it, spinning around them, damaging them. Then Kaguya flies into the air and fires beams of energy down on all enemies. And then glyphs surround the aeon, causing it to glow in an aura of raw energy and flies down at full speed to the enemies. The crash causes a shockwave of immense light, greatly damaging them, and then when things clear up, Kaguya reappears.