They would never be the same. For everything they had shared, every memory that held the other, there was a chasm of disparity, one that had separated them for years. He was never the best, never desired to be, all he wanted was the acceptance of those around him, the ones he cared for, that was enough for him. She was different though, she needed to crush those beneath her, and that included the entire world, she was better than all of them. Acceptance was for the weak, those who couldn't demand respect and loyalty with their skills. She knew she was the best, and one day everyone else would too, it was only a matter of time for her.
He had a hot temper, one that made his actions rash and his apologies numerous, but not her. She held as much anger and hate in her heart as he did, but unlike him it wasn't directed inwardly at herself, it was for the world that stood against her, the people that would turn on her one day. She was cold and calculating, all her actions just a means to the end she desired, a precise decision that she was sure of. She didn't make mistakes.
He was marked a traitor, his face forever branded by his mistakes, his failure, while hers held the rigid beauty of a marble statue. Every glance and whisper of passersby held both awe and pity for them for they were both damaged, his was just easier to see. He wore his emotions plainly not trying to hide them any more than he could the scar that marred the left half of his face. But she hid behind her confidant smile, her natural grace fooling those around her with a false sense of superiority while inside she was slowly breaking.
He couldn't do anything by himself. His very essence seemed to be snuffed out when left on it's own, he needed others because he couldn't trust himself alone. He had made too many mistakes, hurt too many people to trust himself to make the right decisions on his own unlike her. She didn't need anyone, they would just get in the way. She spent her whole life striving to be good enough on her own, so that way when they left she would be ready. They had to be unnecessary otherwise when they were gone she would be missing something, she couldn't allow that. She had to be enough, she knew that all along, but he didn't. He leaned on those around him, they were the strength he didn't have in himself, and when he lost all hope they sustained him, but she was alone, she had always be alone.
He had had every reason to give up. Betraying the only man that had stayed by his side regardless of circumstance for the one that had scarred him from the inside out. He had left the girl that had waited three years for him without blinking an eye for one that blamed him for everything wrong in her life and would never fully accept him. He gave up the life he was born into to for the one he was destined for. Nothing was ever easy for him, but that was his strength, he didn't give up. But not her, she had been groomed for success, born lucky. Everything, her skills, her position, her strength, it was all a carefully constructed cover to mask her inner doubts. Her life had been handed to her, she had nothing to fear because she was perfect, but that's why she could never rest. They would betray her because they were jealous, she couldn't trust them, any of them. She had every reason to keep going, but when the time came, she broke. The pressure, the doubt, the emptiness inside, it destroyed her in the end. She lost the last battle against her demons while he finally managed to win the war against his own.
He was light, one that shone brightest when illuminated by the ones around him. He was the one that would pave the path towards an era of peace alongside the Avatar, one without fear, and war, and hate. He had been in the darkness long enough to see that it would destroy him and the world he had traveled through if not dealt with, that's what made him light. He was able to see the good in people, the hope the world still had because he had been pulled out of the anger and hate that had consumed him for years. She was also light, one that was all-consuming, and demanded attention. It had both the ability to brighten the ones around it, highlight their strengths so that they were able to shine at full capacity, but also the power to destroy. She could destroy those around her if chose, she didn't need them. She lived in the the shadows of her own light until all that was left was darkness. She was alone, she hadn't been enough.
They had lived very different lives together, pulled apart by a world that demanded too much of them both. They're roles could of easily been reversed, but that wasn't what happened. He rose up, taking his rightful place on the throne surrounded by those he loved and who loved him in return. She hadn't allowed anyone to love her though, she wasn't so weak that she would grovel for such a useless human emotion from people that were inferior to herself. She would let herself be destroyed before that, at least then she would die knowing who she was. So when the time had come she ran, not looking back. She would stay herself, she would be alone...just like always.
They were each other's other half, forever intertwined. Mirroring the other in looks and lives until one of them became nothing but the distorted image reflecting in the water. They had never had the chance to be there for each other and they never would. They would never be the same.