Zhou Yun (周集 Shū-shū?) is a martial artist who specializes in the Striking Fist Martial Arts and Kūn, He is also one of the five masters of Shishi-ō no mai. Known throughout the world as the Red Storm (赤い嵐 Aka Arashi?) for his proficiency in his own respective Martial Art.He has also gained the title of the most lethal Beast Master, this is not only because he has mastered his Martial Art , but because when his techniques are applied to his speed, he can fight to such an extent that he can appear to be in several places at once and wipe out an entire small fleet of marines and/or pirates in seconds.