Helian Yi

Prince Jin (晉王 Jìn wáng) Owner of The Window of Heaven; Zhou Zishu's cousin and former superior. Prince Jin's name in the books was Helian Yi. The reason for this change is because the character has been changed so drastically that he can't be called Helian Yi.

He is the crown prince of the Kingdom of Jin, and recruited Zhou Zishu in his youth to help him rise to the throne. He uses Zhou Zishu's many skills for years to frame, smear, and kill political rivals, all in pursuit for power and his ideals of how to govern the nation. In the novel, Helian Yi, Jing Beiyuan, and Zhou Zishu are the three main powers spearheading his fight for the throne against his two older brothers, who eventually are brought down by the trio through various schemes and conspiracies. Unbeknownst to the rest of the characters, Jing Beiyuan is the destined soulmate of Helian Yi.

In the book, Prince Jin only appeared at the start when Zhou Zishu announced his department from the Tian Chuang, his reaction was mild and he never appeared again. In the series however, he serves as one of the main antagonists, emotionally manipulating Zhou Zishu into returning and hunting him down with no care, even going as far as to kidnap him.