Biryuu-un (a Touhou LW original) refers to clouds whose rain evaporates before reaching the ground. This is the temperament of Junko, who leads a life of eternal repetition as she searches for a way to resolve the Lost Word Incident. Junko's temperament has been re-purified. Its origins contain neither Phase nor Essence, only a singular emptiness.

The ability of Junko, who has almost reached the end (a Touhou LW original). Junko 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. There was undoubtedly a period of time where it was believed that Junko could have used her purification ability to cause the Lost Word Incident. But it seems that theory was wrong. After all, if Junko was able to cause the incident, there's no way she would've fallen victim to it... Junko has the power to create gods through purification... but there are still many mysteries surrounding this process. The following text explores the topic of purification, including some wild speculation on the matter. Purification entails a return to origin. As a concept, object, or being's purification progresses, it regresses further and further toward its original state. Structures built on order are dismantled into their fundamental components. It's the equivalent of matter being separated into atoms, elementary particles, and finally, strings. Cities collapse and revert into small settlements as civilization crumbles, leaving humans to survive using only their baser instincts. Planets with their own complex ecosystems become giant spheres of red magma before reverting into stardust. As Junko's own resentment is purified, all reason for its existence fades. All she knows is that the reason once did exist. But even knowing that is a type of order, meaning that it, too, is lost at the hand of purification. There are no longer any reasons for emotions. In fact, the "reasons" behind emotions are nothing more than stories created by the mind's desire for order. There are no reasons for emotions, and there never were. As Junko's purification continued, she went beyond the moment of her birth, spiraling ever further toward her origin... She returned to an ancient era in which she may have lived as a human. Then went further back, to an age where gods walked among humans. She went beyond the Cretaceous–Paleogene boundary to the Mesozoic era, the Paleozoic era, the Neoproterozoic era, the Mesoproterozoic era, the Paleoproterozoic era, the Neoarchean era, the Mesoarchean era, the Paleoarchean era, the Eoarchean era... and finally, the Hadean era. She lost all attachment to others and the world around her, roaming aimlessly through the disorder of the world's beginning. That was where her lives always began, and there had been too many of them to count. Purification Crystals Junko believes the purification crystals are the magical power of her memories, but that's not quite true. It's not the magical power of her memories but of fragments of the worlds she's observed. Put another way, the purification crystals are the magical power of life.