Heroine: Lin Xiaoman
- Identity: The soul of a social animal in the 21st century transformed into the "evil female supporting character" of the Shangshu Mansion. She refused to get involved in house fights and devoted herself to running a "fishing soy milk shop" to make money and survive.
- Personality: A level 10 contestant who is good at using modern thinking to counter the ancient rules; he appears to be sober but is actually sober and transparent, with frequent golden quotes (such as "problems that can be solved with money, resolutely use your brain"); obsessed with food and money, and carries the "Guide to Getting Rich in the Capital" with him.
- Skills: Marketing genius (inventing routines such as "the second cup is half price" and "collecting stamps in exchange for bean bags"), master of reverse painting (drawing a blueprint for employees to "open a chain of soy milk shops in the future"), expert in emergency rebuke (can talk for three hours without using any repeated words when repelling a noble lady who comes to find trouble).
- Hidden traits: Occasionally show the sequelae of being a social animal (for example, when seeing the moon, one will sigh "like a pie chart in Excel"), have ptsd over the word "overtime", and will reflexively throw the brush when hearing "change the plan".
Male protagonist: Shen Yanbing
- Identity: The owner of the "Shadow Pavilion", the No. 1 Killer organization in the world. His true identity is "Qi Yan", an orphan from the former dynasty. He lurked in the capital to investigate the corruption case of the Shangshu Mansion, but accidentally became the waiter of the "Moyu Doujiu Shop".
- Personality: Cold-faced in front of others (his eyes can freeze people to death when killing people), behind the scenes, he has been tamed by the heroine as a "sound-minded" spirit; full of poisonous tongue attributes (complaining to the heroine, "If your business talent had been used in the right way, you would be as rich as the rest of the country"), but always protects the heroine at critical moments (for example, after helping the heroine block the dirty water being splashed, he will use his internal power to dry her skirt.
