Beiwen, the male protagonist is a general, and the female protagonist is a typical example of feudal ethics. She is not as skilled as Princess Zheng'an, who can protect her family and country, nor is she brave enough to resist like the early Concubine Yuan Gui. She is not perfect. So you can regard anyone as the protagonist, and no one is an absolute bad guy.
Intention: One wrong thought can eventually lead to a big mistake