Fan Jian's adopted son; the son of the emperor and Ye Qingmei. He is skilled in poison, medicine and martial arts. His level of martial arts is between level 7 and level 8 but it can reach level 9 when someone close to him dies, this can be seen when he defeated and later killed an 8th level martial artist with ease who was twice his size. He has memories from the 21st Century which allows him to use that knowledge to his advantage. Lin Wan'er's love interest and fiancee.
Commandery Princess. The illegitimate daughter of Lin Ruofu and the Elder Princess. Fan Xian's love interest and fiancee. She met Fan Xian in a temple while holding a chicken drumstick. She suffers from Tuberculosis, later Fan Xian treats her disease.
The tyrannical ruler of Qing, and a martial arts grandmaster. (Besides his surname Li, his given name was never mentioned, as the author said that such a role that could be simply referred as "the emperor His Majesty" needed no given name)
Empress Dowager of Qing. Mother of the Emperor, Elder Princess Li Yunrui and Prince of Jing. Paternal aunt of the empress. Her clan was blamed for the death of Ye Qingmei and slaughtered by the Emperor.
Fan Xian's birth mother, and lover of the emperor. Her inventions made the royal family wealthy which created the Royal Treasury and also founded the Overwatch department. She is killed by the emperor after he becomes uneasy about the influence and power she wields in court.
Ruthless and astute head of the government's Control Department, an investigative agency that monitors other government branches. He is protective of Fan Xian and treats him like his son and wants him to inherit the role as Head of Overwatch Department. He has an unrequited love for Fan Xian's mother and was the king's close friend and trusted subordinate. Lost his legs to Xiao En.
Head of the first bureau of the control department.
Head of the third bureau of the control department. Fan Xian’s first teacher. Master of Poison.
Acting head of the third bureau of the control department.
Head of the fourth bureau of the control department.
Head of the fifth bureau of the control department. Known as Black Knight.
Head of the sixth bureau of the control department. Known as Lord Shadow. He appears mysterious and no one has ever seen his face under his mask and hood. He is highly skilled in martial arts and according to Chen Ping Ping, he can wipe out an army of a thousand by himself.
Head of the eighth bureau of the control department. He is in charge of the publication of books
Fan Jian's mother. Fan Xian's (adoptive) grandmother. Fan Ruoruo and Fan Sizhe's biological grandmother. She lives in Danzhou and looked after Fan Xian when he was born. Fan Xian deliberately asked his grandmother to act cold towards him so she wouldn't be targeted by enemies who wants him dead. She cares deeply for Fan Xian.
Fan Jian's daughter, Fan Xian's (adoptive) younger sister, Fan Sizhe's elder sister. Since childhood, they lived together in Danzhou, later her grandmother arranged her to leave for the capital to live with her father. She and Fan Xian have a close bond. When Fan Xian reached adulthood they are reunited and are now living in the capital.
Commander of the Imperial Guards. 9th level martial artists and highly skilled in archery. He has sharp ears that allow him to distinct peoples heartbeat in nearby surrounding. He was promoted from a hunter by Princess Yunrui, he kept loyal to her.
Lin Ruofu's second son, he dislikes Fan Xian.
Lin Ruofu's first son. He suffered brain damage at a young age. He and Fan Xian get along well.
The drama received positive reviews for its skillful adaptation of the original novel, comedic elements and logical story flow. It also received praise for its cinematography, acting performance, special effects and action scenes; as well as its tight plot and interesting storyline.