Ren Ru Yi --- Liu Shi Shi
An Guo's Left Envoy of the Crimson Robe. Ren Ru Yi has a cold and proud personality. She was originally Ren Xin, the Left Envoy of An Guo's Crimson Robe, and also the number one assassin in the world. In order to investigate the cause of the Empress's death, she assumed the alias Ru Yi and embarked on a path of revenge to uncover the truth. During her journey, she made friends who could accompany her side by side. Through her interactions with her companions, Ren Ru Yi, who had always been a solitary assassin, gradually began to experience the power and warmth of teamwork, undergoing gradual changes.
Ning Yuan Zhou --- Liu Yu Ning
He is the youngest Master of the Six Paths Hall in Wu Guo, but due to his straightforwardness and unwillingness to compromise, he offended influential ministers in the court and was forcefully dispatched to the battlefield.
Yu Shi San --- Fang Yi Lun
He was the youngest son of Duke Wang Yi, the Protector of the Nation, and the biological younger brother of the Crown Princess. Due to their mother's humble background, he was raised outside the main residence and his true identity was known to very few people.
Yang Ying --- He Lan Dou
Princess Wu Guo, despite her noble status, is passionate about righteousness and chivalry. Although she is a princess of the country, she has lived a secluded life in the cold palace since childhood. It was Ren Ru Yi who taught her martial arts and showed her that women can also make a mark in the world. This paved the way for the later confident and assertive Yang Ying. Therefore, Ren Ru Yi is Yang Ying's master and the most important person in her journey of growth.
Chu Yue --- Chen Hao Yu
Chu Yue is the beloved daughter of the Duke of Anguo. She has a fondness for equestrian activities and possesses a lively personality. She does not have favorable feelings towards Li Tongguang and is dissatisfied with the arranged marriage arranged by the Emperor of Anguo. Chu Yue has made several attempts to make things difficult for Li Tongguang, but he has managed to avoid her efforts and evade confrontation.
Li Tong Guang --- Chang Hua Sen
Anguo Changqing Marquis. Li Tongguang is the son of Anguo Chang Princess and Mian Shou. Due to his lowly birth as the son of a commoner, Li Tongguang was treated poorly from a young age and only felt warmth in the presence of his mentor, Ren Xin. As a result, he developed unconventional feelings for Ren Xin. During the six years when Ren Xin was absent, Li Tongguang started as a low-ranking cavalryman and gradually accumulated achievements, becoming a Marquis of Changqing that no one dared to underestimate.
Sun Lang --- Li Huan
Yuan Lu --- Chen You Wei
During one of Ren Xin's outings, he encountered bandits who were attacking the Yuan Lu family. Although he immediately stepped forward to assist and drew his sword, he could only save Yuan Lu himself in the end. The rest of the family members were killed. Ren Xin brought Yuan Lu back and treated him as a beloved younger brother.
Qian Zhao --- Wang Yi Zhe
Jin Mei Niang --- Huang Meng Ying
Empress Zhao Jie --- Wang Yan
Xiao Yan --- Chen Du Ling
Jia Ling --- Zhang Zhi Xi
Du Zhang Shi --- Lv Xing
