Steel Rose by Kathryn Ann Kingsley

The commander of the East Wind Dominion is a terrifying man. He leads an army of automatons. He can control lightning itself. And now, Rose Calder is his prisoner of war.
All Rose has ever known is fighting. When the invading forces of the East Wind Dominion robs away her friends, her family, and her home, she takes to the skies to battle for her freedom. For hope.
When the war comes to a sudden end at the hands of commander Viktor Lang, she is certain she is about to die. When he discovers her impossible secret, she becomes a mystery he is desperate to solve, and that may be worse.
The war may be over, but now she stands to lose much, much more.