Su Qingci
- Identity: The eldest daughter of Zhongshu Ling, a lady from a famous family, and famous in Beijing for her talent.
- Personality: soft on the outside but strong on the inside, very good at observing words and emotions, making plans and calculations, never showing his emotions, and taking care of things step by step.
- Skills: Machiavellianism, human heart, poetry, medical science, undercover intelligence
- Purpose: Preserve the family, overthrow the political opponents who framed the Ling family, and allow father and brother to gain a stable foothold.
2. Bai Anyu
- Identity: Daughter of the Duke of Zhenguo, heir to the hereditary title, in charge of part of the military power of the capital
- Personality: cool and taciturn, decisive in acting, seemingly unreasonable, but in fact he values love and justice, and has strong observation skills
- Skills: military power, military, secret guard, case solving, escort
- Purpose: to safeguard the military power of the Duke's Mansion, avoid royal suspicion, and find out the truth behind the unjust death of his mother.
Purpose: Marriage with a piece of paper, marriage first, love later, ultimate strategy, liquidating enemies, stabilizing power, revealing one's feelings, and staying together for a lifetime