The Mysterious Warrior's true name and origin are unknown. All that it is known is that he is the successor of a deadly martial art known as Gensatsuken (幻殺拳), whose school has been in conflict with the Lee brothers' own style of Sōsetsuken (双截拳) for generations due to their contrasting ideals. He forms his own organization following the downfall of the Black Warriors, targeting various martial artists, including the students of the Lee brothers' own school. When Billy Lee's girlfriend, Marian, is killed during one of their attacks, the Lee brothers pursue the organization until reaching their island stronghold, eventually coming face to face with the leader himself. After being defeated by the Lee brothers, the Warrior tells the Lee brothers about the prophecy that has been passed down wi