I Return from the Political Marriage as the Empress

Qi Zhi: The Princess of An Guo of Great Zhou. After returning from ten years of marriage diplomacy in an enemy state, she executes corrupt officials, purges the court, puts down traitors, and eventually ascends the throne.

Huyan Zhang: The second son of the King of Beidi and Qi Zhi's late husband. Qi Zhi was originally meant to marry his father, but he won her for himself with his military achievements. Over the course of ten years, he taught her everything he could, took an arrow for her, and spent ten years planning for her. Even after his death, he helped her return to her homeland and ascend the throne.

Rong Chen: The regent of Great Zhou and Qi Zhi's childhood sweetheart. When Qi Zhi was forced into a political marriage, he escorted her all the way there. After Qi Zhi returned to her country, he helped her younger brother ascend the throne and protected Great Zhou for her.