This is probably a story about a Vanity Fair socialite who traveled through time and became the white moonlight stand-in for a big boss, and then fought her way through the world.
Hostess: Treat me as a substitute. Do you deserve me as the key?
Note:
1. When the villain seizes the horse, the heroine will seize the horse more than the villain.
2. The heroine is "both civil and military"
Purpose: Love and Peace