She lurked in the enemy's hinterland because of her hatred of genocide, just for revenge. It was a world of killing and being killed, when she was finally ordered to raise her sword and swing it at him. Those ten years came from the inner entanglement and huge pain.
He didn't know her, but she loved him deeply. She killed his wife just to have a chance to have a place at his side.
She was willing to cut off all her options just to make him feel better, and disguised herself as his wife to accompany him through the quiet years.
Until everything turns into bubbles and shatters. His sword pierced her heart, and everything turned into unspeakable pain.
It turned out that he already had her in his heart.
Conception: