AN: Yuya, Yuto, Yugo, Yuri and Zarc are literally the same person. Different aspects and their composite, sure, but still the same person and I fully intend to exploit that.
It had been so damn easy. He'd never before realised how willingly people would wholeheartedly believe a lie. A carefully crafted lie, with layers and layers of manipulation and misdirection - but a lie nonetheless. One so very vast and far-reaching, entangled with the fate of all the dimensions. It all started with one fact: Zarc did not die that night, fourteen years ago. He was preserved in the memory of four boys.
There were things nobody realised, things nobody could realise - except him. After all, for all her bravery, Ray was only a human girl. Zarc on the other hand, was a being of supernatural power, far more sinister in origin than anybody had realised. Including Zarc himself.
When the two of them had been split, Ray had remained a normal girl. Her counterparts could not fuse back together by themselves. Zarc's could. And that was only the first in a multitude of differences. Ones that stemmed from a second fact: Zarc was far, far from human.
His entire life, Yuya had felt hollow. Incomplete. Broken. There was a huge, vital part of him missing. There were memories in his head that did not belong to Yuya Sakaki. There was the constant, nagging feeling that something about his life was terribly wrong. And the raw agony of power, humming under his skin, that was only soothed by Odd-Eyes.
Yuya smiled and joked and put on a show - all to hide the truth he had known since he was born. (created? came into existence?)
It wasn't until he met Yuto and Yugo that it all finally made sense.
In the end, Zarc and Ray fought again and all the while, people were falling further and further into his trap. Ray declared confidently that she would always be there to stop Zarc. Yuzu pleaded for Yuya to return. Neither of them realised just how fake it all was. (Ironic, considering that Ray, of all people, should have known.)
Zarc and Yuya were the same person all along.
Zarc and Yuya were the same person all along.
And that made all the difference.
Yuya had never been taken over by Zarc. There was no evil to purge from Yuya's soul- considering that Yuya was Zarc's kindness and there hadn't been much of that left, at the end. As long as Yuya existed, Zarc would always be there, and vice versa. Zarc had never been sealed away. There was no difference between his soul and Yuya's.
All it had taken was Yuya's sweet words and elaborate acts. Zarc's loss became Yuya's victory, and he was free to pursue his plans another day. (This time with all his memories intact.) Had he realised how much potential this situation had before, he would've exploited it. Oh well, he had all the time in the world now.
It had become a grand show, with all the world as his stage.