The anti-heroic protagonist of the series and a third mahai angyo onshi from the fallen kingdom of Jushin. Despite the common perception held by Jushin's former citizens that angyo onshi are virtuous and bearers of justice, Munsu usually comes across as somewhat amoral and does not believe in helping people who refuse to help themselves.
When he does help others, his methods almost always involve excessive bloodshed, lying, torture, and other questionable acts.

Teacher who has mastered 9 styles of martial arts. With a mysterious past who seems to hold a grudge for the martial artists federation relating to the death of his master.
At the beginning of the story he seems to be a perverted middle aged man who came to the school going undercover as a teacher. After Shioon discovering his martial art skills, shioon bribes him with a video clip. Continuing Chun woo discovers Shioon's hidden potential and teaches foot and arm techiniques.As the story progresses, he shows more of his past and growing relationship with his new disciple.