- Protagonist: Yunzheng (the son of the deputy general of the border army of Zhao State, who bears the blood feud of his family and country, learns top swordsmanship and assassination skills, and finally embarks on the road to assassinate Qin)
- Protagonist's father: Yun Lie (the deputy general of the Zhao Kingdom's border army under Li Mu's tent, died in the battle when Handan City was broken, leaving you with the obsession and clues to assassinate Qin)
- Master: Gai Nie (the first swordsman of the Warring States Period, the first commander of the Black Ice Platform of the former Qin State, who lived in seclusion after defecting, and is also your master and father to help you grow up)
- Core villains: Ying Zheng, Zhao Gao (historical figures who are well-known throughout the country, retain the original settings)
