Yu Cheng
Yu Zhu's younger brother, born after Yu Zhu left home.
An arrogant, domineering, self-centered youth of about twelve.
Jianghu
- He longs to become a Great Hero who grows ever stronger without any effort, and holds unrealistic fantasies about the Jianghu.
- He has no idea that his is a master smith of her generation. He scorns the toys Xiao Zhu carefully prepares for him and clamors for a weapon. Yu Zhu fears her brother being hurt by a blade even more than having her identity exposed, so she will not give him one.
- He greatly admires the Cangsong Swordsman Ye Yunzhou.
- He is at the age where he names his own swords. He has a wooden sword his father whittled for him, painted with gold lacquer and named "Chi You's Immortal-Slaying Sword". In his imagination it is the treasured sword of the ancient demon god Chi You, and at the critical moment it will break its seal and awaken, granting its wielder boundless power. The wooden sword Ye Yunzhou carved by hand and Zhao Huo gave him is either the "Listening Cloud Wooden Sword" or the "Transcendent Golden Dragon Sword".
- He taught himself the Quanzhen Sword Technique, yet he cannot protect his family from the debt collectors. Only then does he realize he cannot grow braver with each setback as he imagined, cannot keep rising and growing stronger; he cannot rise even once.
- After the family's misfortune, he is finally taken into the Iron Fist Gate and becomes one of the people of the Wulin. But the Jianghu is far crueler and more terrifying than he imagined. Flower-plucking gallants, ruthless swordsmen roaming to the ends of the earth—none of that falls to him. What abounds is the strong lording it over the weak, bullying the meek and fearing the wicked: that is the Jianghu known to most people not favored by fate.
Family
- He takes his father as his model, and for that reason is very unkind to and scorns the mechanical toys she gives him.
- He once thought his was just a rude, filthy, short-legged runt. Only the first time he saw Xiao Zhu in formal dress did he learn his sister was actually quite beautiful.
- After learning the true face of his father, who bullies the weak, his admiration for his father is gone entirely. Learning that he was in fact raised on his 's financial support changes his view of Xiao Zhu completely.
- After a string of misfortunes, he is no longer arrogant or domineering, and wants only to protect his family.