Tenkirin (a Touhou LW original) refers to a "weather wheel," a fictional construct or perhaps a type of weather that is presumably related to various religious and astronomical concepts. This is a telling temperament for the Mokou of this world, who was remade as a person of Hourai. Mokou's temperament has been completely reconstructed. Her being has been reformed with multiple layers, just like her Legendary Mantle. This grants her perfect insulation through anti-entropy, which was thought to be impossible. (Strong against Fire Phase and Water Phase.) However, her existence is reliant on a device created in the Age of the Gods―the moon. (Weak to Moon Essence.)

The ability of Fujiwara no Mokou, who has almost reached the end (a Touhou LW original). Mokou completely lost this ability due to a Lost Word. She is currently regaining it little by little, though not through restoring or replicating her old ability, but with a newly constructed original ability that formed a core to build upon. She has continued to travel across worlds to try and end the Lost Word Incident. The people of Hourai never die. So how could one's existence be erased? It sounds impossible when you first think about it, but you merely have to change your perspective. For example, take a book that features a perfect and unbeatable hero. If you tear the pages out and throw them away, that hero shall perish and be lost forever. That is what happened to Fujiwara no Mokou. Mokou is one of the Restored. And it seems her immortality still comes from her nature as a person of Hourai, even after her restoration. However, the same cannot be said for her fire. The origin of her fire is a total mystery. Does it come from a type of ninja youjutsu that she developed during her days as an avid youkai exterminator? And why fire instead of any other element? The only sure answers to these questions reside in Mokou's memory. Fire is a symbol of human civilization. It is energy and plasma. This Mokou's fire is a manifestation of these concepts. Fire has always been fleeting, which is why there is deep meaning and symbolism behind passing a flame or torch from one person to another. And it seems that doesn't change even for an immortal who has ceased being human and no longer needs history. Even the light cast by fire couldn't shine within the perfect darkness, so she needed a new fire―a fire fueled by information. So she set her information, her old memories, alight. Legendary Mantle: A portion of Tsuki no Iwakasa's (Iwakasa of the Moon's) will that materialized to watch over Mokou. His will took a form similar to how the Fire-Rat Robe is described in legends because Iwakasa held a position in court as the specialist in charge of handling the Emperor's strange tools and artifacts. Iwakasa's surname, "Tsuki," can be written with the kanji character for "investigate" or for "moon" and can also mean "to adjust and set something up." That's why his clan was charged with handling any magic items that came into the Emperor's possession... and disposing of any that were not required or too dangerous. None of the five strange items spoken of in The Tale of the Bamboo Cutter were genuine magic items. Of course, Iwakasa never saw the authentic items either, but he possessed the most knowledge about them. In fact, Prince Ishitsukuri, Prince Kuramochi, Abe no Miushi, Ootomo no Miyuki, and Isonokami no Maro only gained information about each of the treasures they sought by talking to Tsuki no Iwakasa. Ultimately, the Legendary Mantle became an almost indistinguishable replica of the Fire-Rat Robe with some unique structural modifications thanks to Kaguya Houraisan and Keine Kamishirasawa's abilities. They chose the Fire-Rat Robe because it is a hyperdimensional item that ignores the laws of entropy. Kaguya Houraisan used her ability to give tangible form to the principal-of-physics-breaking design, and Keine Kamishirasawa used her ability to adhere strata containing historical information between the layers of fabric to "glue" the garment together. It was designed this way to expand Mokou's memory as much as possible and maximize the amount of information fuel Mokou can use for attack and defense. This magic item is literally the history of the Earth given form and can only be wielded by a human who has lived for centuries. But there is one more requirement. To wear this mantle, you need to have sinned. Because this is the history of the Earth made manifest.