The story of Kadaj...
Sephiroth: Ha, ha, ha... Who is it? Hmph... traitor.
Cloud: Traitor?
Sephiroth: You ignorant traitor. I'll tell you. This was a itinerant race. They would migrate in, settle the Planet, then move on... At the end of their harsh, hard journey, they would find the Promised Land and supreme happiness. But, those who stopped their migrations built shelters and elected to lead an easier life. They took that which the Cetra and the planet had made without giving back one whit in return! Those are your ancestors.
Cloud: Sephiroth...
Sephiroth: Long ago, disaster struck this planet. Your ancestors escaped... They survived because they hid. The Planet was saved by sacrificing the Cetra. After that, your ancestors continued to increase. Now all that's left of the Cetra is in these reports.
Cloud: What does that have to do with you?
Sephiroth: Don't you get it? An Ancient named Jenova was found in the geological stratum of 2000 years ago. The Jenova Project. The Jenova Project wanted to produce people with the powers of the Ancients... no, the Cetra! ...I am the one that was produced.
Cloud: Pr...produced?
Sephiroth: Yes. Professor Gast, leader of the Jenova Project and genius scientist, produced me. Cloud: How...how did he...? Se...Sephiroth?
Sephiroth: Out of my way. I'm going to see my mother.
This was the moment when Sephiroth finally went mad. He had finally found out the truth, although in all reality even his new found truth was also a lie as he had grown to believe Jenova was a ancient, when infact it was a parasite from Space, its origin unknown to all but Jenova and possibly Sephiroth. Spehiroth thought he knew all there was to know, how Gast had discovered Jenova who had been there for 2000 years, how it had been the cause of a massive disaster so many years ago. Yet he didn't find out one major point. While Sephiroth was in that rampage, another youth was growing up under the watchful eye of another scientist, one that was equally as mad as Sephiroth was to become. He was called Kadaj and his secret file was held deep, even further then the infamous Sephiroth…his life up to the first Reunion was much as Sephiroth, however it was soon all to change due to the calling….a power no clone could resist and once that arrived, he would begin to question Hojo about everything before disappearing in search of two other Jenova clones beings, the most complete beings of Jenova's apart from Sephiroth. This calling would lead Kadaj to find those two people and would also start to fell Jenova's urges playing stronger and stronger on them as the Reunion began in the northern Crater….They would resist the urge and forms a new band of elite fighters, little did they know they would be used, by Sephiroth nd tempted by the complete power of Jenova……..