After being defeated by Tang Xiu became his slave.
- Successor of the Schoolmaster of the Northstar One Blade School
- She became a slave to Tang Xiu through the Soul Ruling Spell
Northstar One Blade School has a very unusual custom and each and every person there is very ruthless, yet they also have an iron law that, if the successor of the Schoolmaster of the Northstar One Blade School were to fall into the hands of the enemy, they would agree to become their enemy’s slave for three years in order to live. But three years later, the opposite party must return them back.
“I, Kuwako Yamamoto, swear an oath to serve the man in front of me as my Master starting from today. His command is my wish, and I shall never betray him. If I were to violate this vow, let me be forever imprisoned in the thousand cold pools.” Ch.253