He is one of the Four Gundam Beast Kings who waited for Shodai Gundam Daishogun at Sai no Kawara. He is said to be a warrior who possesses the power of Kozanten, one of the Four Devas of Heaven, and is also said to be the incarnation of the "Rhino" who lives at Sai no Kawara. He helped Shodai Gundam Daishogun who were attacked by the Darkness Army at Sai no Kawara, and gave them the "Shield of Might" to defeat the return of darkness and the "Caller's Flute" that can call Hayabusa Gundam. His helmet has a "King of the Mountain's Light" that shines even in the dark night. He wears the Purple Rhino, his guardian beast, as armor, and during battles he transforms into the Rhino King Form. In Sai no Kawara, he can use his Bakukouretsu to unleash a special move called the Gyokusai Geki, which releases an earth-shaking impact. He is also the father of Musha Psycho of the Seven Mushas and Musha Psycho Mark Two of the New Five Mushas.