Ep. 5: The Girl Named Rion
The Half-Demon Princesses befriend Rion, the only child of Beast King Kirinmaru of the Dawn, who had perished six centuries previously but had her spiritual essence perpetually bound to the earthly plane by the deep obsessive fatherly love Kirinmaru still has for her. With her own strength and resolve to put a stop her father's ambition and bring forth the Degenerate Age foretold by the Sacred Tree of Ages, Rion sustains her spirit within an artificial body, and Towa receives the ancient Star-Slicer Flute that transforms into the supremely powerful star sword, Zanseiken. With a universally powerful stellar demonic-empowered star sword equal in strength to the Bakuseiken wielded by Kirinmaru, the Half-Demon Princesses are ready to face anything or anyone that either Kirinmaru or his elder sister Zero send their way. (Source: Wikipedia)