Episode 29 (Hanyō no Yashahime)

The Girl Named Rion is the twenty-ninth episode of Hanyō no Yashahime, and the 5th episode of the second season titled "The Second Act."

Synopsis

 * 1) Rion reveals that she died 600 years prior, but her soul is being kept on this plane of existence by her father Kirinmaru. Setsuna severs the which tethers a Dream Butterfly to Rion, thus allowing her to move freely away from Mount Musubi.
 * 2) The Kyūyōkon Root transforms into the Star-Slicer Flute, which then transforms into the Zanseiken, Towa's new sword.
 * 3) Sesshōmaru destroys Setsuna's Dream Butterfly, allowing her to sleep again. However, doing so puts Rin's life in danger as Zero's silver-scale curse is back in effect.

Summary
Rion continues her friendship with the Half-Demon Princesses. Riku is nearby slaying thousands of small fly-demons. She says she lost her life 600 years ago. Kirinmaru has been overprotective of her ever since. He, as most daiyōkai, sent his child away to safety. Rion considers it a prison sentence and never approved of Kirinmaru's quest for world domination is to find a spirit named Akuru to move the Windmill of Time that would leads the Degenerate Age. He used a Dream Butterfly to keep her asleep and to communicate with her when they are asleep. There is also a red thread of fate that holds the curse together. Setsuna is recruited to break the thread and destroys Rion's Dream Butterfly. The cocoon has fell apart, and it appears to be her vessel for her soul, made from her bones and grave soil. Kirinmaru's aura have appeared from the cocoon as he tells Rion that it's dangerous for her to leave it there, get back inside the cocoon and must not leave Mount Musubi. He drags her back to safety, but she reclaims her body and frees herself from him. With the barrier subdued, she tells Towa to use Kyūyōkon Root which transforms to the Star-Slicer Flute. It transforms again to be Zanseiken which she uses to slay the demons and needs to again in order to match Kirinmaru and his Bakuseiken. Sesshōmaru, who has been following them, asks about Setsuna's skill level in her newly upgraded and supremely powerful naginata.

After expressing her wish to save her mother, Sesshōmaru destroys Setsuna's Dream Butterfly. He asks Moroha if she had encountered her father Inuyasha and leaves, not answering her question as to how he knows about her father's incarceration. On their way back to Kaede's village, Towa saw Riku who has also been following them and meets Rion. He tells them that Kirinmaru can access Riku's senses and warns them to get away. Thus, Towa approaches Riku and shouts through him to warn Kirinmaru that they are not afraid of him. Riku drives Rion to his place and promises they will meet again. Setsuna instantly collapses and begins to fall asleep for the first time in a decade. She finds it very annoying as she does not have much time to save Rin's life from Zero's fatal curse.

Trivia

 * While Kirinmaru and Rion travel around the world, the building of in  is seen before the ruins in the modern era.
 * The way Rion rises again with a body made of bones and grave soil is the same way the spiritless Kikyō did when she was forced to return to life.
 * After Setsuna cuts the red thread of destiny between Rion and Kirinmaru to cut Rion's Dream Butterfly, she saw the Dream Butterfly out of her for the first time since Towa saw it in "Secret of the Rainbow Pearls", and "Wielding the Tenseiga".
 * Setsuna's ability to sleep finally returns after Sesshōmaru cuts the Dream Butterfly with Tenseiga. However, as a result, the silver-scale curse cast upon Rin by Zero starts up again.
 * When Kirinmaru shows Rion around the world, they flew over the to see the  before the second  from the  in 1281 as Tōga fight against Hyōga of his clan.
 * Towa has been shown to know how to play the flute well, which transforms into the almighty Zanseiken, the opposing demonic, stellar sword that is equal to the one wielded by Kirinmaru, the Bakuseiken, which he had used to destroy the Grim Comet's fragment with his incredibly strong Blasting Barrage attack and had fought Beast King Tōga of the West, and eventually the Half-Demon Princesses with several times.
 * Sesshōmaru speaks to his half-niece and calls her by her name for the very first time; mentioning whether she had seen Inuyasha, his younger half-brother and her father, as well. He does not answer her question as to how he knows of her half-dog demon father's imprisonment in the Demon Graveyard.
 * The red thread of fate between Kirinmaru and his daughter Rion is shown to have been connected by several threads; whereas Towa and Setsuna's young human mother Rin's is linked to Zero by just one.
 * This marks the first time Towa announces the name of her strengthened and evolved dragon-based demonic attack she inherited from Sesshōmaru, and that Kirinmaru himself suggested; Twin Azure Dragon Wave.
 * In "The Curse of the Man-Eating Pond", Setsuna was about give Towa a hi-five but was against such childishness until now.
 * How the Bakuseiken and Zanseiken fell to Earth is exactly how the Supreme Power of the Heavens had by diving into the supremely powerful Sunflower and Moonstone in the animated show of the 2010 3D movie Tangled.

Error

 * Among the places Kirinmaru and Rion flew above is which, however, should not have been there back then as it was built during the 17th century.
 * After Setsuna sever the thread of fate and Towa gives the message to Kirinmaru, as Kirinmaru resting there's missing a symbol on his right arm.

Episodi 29 (Hanyo no Yashahime)