A/N: To be honest, I don't know as much about Leon as I do about Takumi, but that doesn't mean I love him any less. What can I say? I just absolutely adore the little brothers in Fire Emblem Fates. Don't get me wrong, I love the other siblings too. I just have a special soft spot for the younger brothers. I apologize in advance for an OOC stuff.

Once again, I'll use the Japanese names, but this will be written from the Birthright path. There will be two parts for this. The first chapter will be through Kamui's POV and the second chapter will be through Leon's POV. The dialogue is similar though not from the game because I'm too lazy to write it down word for word. Potential spoilers… maybe? I'm not really sure… But this is supposed to take place during Chapter 18 in the game, so you have been warned!

Kamui felt her heart twist painfully at her brother's hostile gaze. There was so much hatred in his eyes, so much darkness. Was this the same little boy she had called her brother for so many years? How could one decision change him to such a cold, apathetic person?

Kamui didn't doubt the decision she made, but she couldn't stop the wave of guilt that washed over her as she met Leon's gaze with a helpless stare. She had betrayed him. She wasn't so naïve that she didn't understand the reasoning behind his hostility. Kamui had betrayed him by leaving the family that had raised her. She betrayed him by joining their worst enemies. Every time he saw her, it was probably like getting stabbed in the back again and again.

But as she looked deeper into his eyes, Kamui could see a hidden pain locked away in his heart. What was it? What was burdening him? If only they weren't in the middle of a battle. Then she could ask him what was wrong and comfort him like she used to. But no, they were forced to become enemies. Her choices made it so she could only see the Nohrian half of her family on opposite sides of the battlefield. And she hated it.

The faceless around her shifted restlessly, waiting for the command to attack as her own army readied their weapons. They squinted through the darkness, trying to adjust to the unusual area, but Kamui was only focused on the young man who sat on his horse a few yards away from her. The tome in his hand was open and she could feel the surge of magic around her. He was always so good at magic.

"Leon!" Kamui cried out.

"Hello, sister," he greeted coldly, spitting out her name with hate. "It's time we settle this. I've even gone through the the trouble of trapping you in a graveyard. It's fitting, isn't it? It shows how dead you are to me."

The princess's face fell, clearly showing the hurt, uncertainty, and hesitance that she felt. "You… you don't really mean that, do you?"

"Of course I do. I've always hated you. You were always the favorite, so now I'm glad that I finally have a chance to get rid of you."

Kamui's hands clenched into fists and she lowered her gaze to the ground. In a terribly quiet voice, she repeated, "Do you really mean that?"

Leon's cold laugh echoed through the graveyard. "I do, for you're no longer my sister."

And with that, the battle began.