Prospective Aruchi (female Tao master) and daughter of the key's guardian. She trains Sang-hwan, assists in the battle against Heuk-woon, receives half the key, and eventually forms a professional partnership with him.
Yoon So-yi has 7 screen credits in a career dating back to 2004. Signature works include Arahan, The Lost Choices, Brothers in Heaven. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
