Birth of an Empire by ]
He cannot bear to deny her anything, not knowing she is his and hers alike; her blood, his blood. Her tears, his tears. He has torn the galaxy asunder for Palpatine, but he will stitch it together for Leia. His Leia. He had known from the moment she took her Senate seat; incorruptible, all eyes on her as she led an unpopular issue (the rights of the remaining clone troopers, he remembers) and turning the tide of the galaxy to her side. Palpatine had wanted to end her and the entire Senate for daring to succeed where he had failed. Vader had ended Palpatine for her. She, and she alone, had convinced him he was capable of it. AU where Vader kills Palpatine and sets Leia up as Empress in his place. Sharp and disturbing in the best way.