Shiroi Nagi (a Touhou LW original) refers to a white lull in the wind. In a world devoid of wind, a white sea churns chaotically beneath a dark sky. A girl wanders atop the surface of this sea. Is she a divine spirit? A ghost? Or is she a spiritual projection? Perhaps, within her mind, she is continuing her never-ending journey in a faraway world. This girl is a fragment of Sanae Kochiya. She is a shrine maiden of the wind (strong against Wood Phase), a descendant of gods, and a living god (strong against Star Essence).

The ability of Sanae Kochiya from the lost world of spirits (a Touhou LW original). She has completely lost her ability, and she has forgotten everything about herself. What kind of world did this Sanae come from? Unlike the other universes or multiverses, there is no detailed information about this Sanae's home world because she has lost her memory and ability. So, the only insights into this world have come from observations of her disposition and nature. The only discernible difference (excluding her loss of memory and ability) between this Sanae and the Sanaes of other worlds is that this Sanae has the properties of a ghost. The memories this Sanae has kept are of things that were common knowledge in the outside world before she came to Gensokyo. She has forgotten all about Kanako, Suwako, and Moriya Shrine because these things are directly related to her. So, basically, she knows how to speak, read, and write and possesses knowledge of things like objective facts, scientific theories, and events that were reported in the news during her time in the outside world. This information was used to determine the time and place where she lived, but they were the same as the other Sanaes. What's truly puzzling is how she has no knowledge of Gensokyo. Did this Sanae never move to Gensokyo, or did something cause her to lose these specific memories? This Sanae cannot cause miracles to occur. It's like she's a version of Sanae based on the idea that Sanae is just an ordinary human and that her power to create miracles was merely a blessing bestowed on her by the two gods. Her rituals are meaningless, and her secret rites are ineffective. Her wishes are never granted, and nobody listens to her prayers. This Sanae is forever alone in every sense of the word. Miracles are events of religious significance that have very low odds of occurring. They only happen according to the will of a god, and they are revelatory in nature. No matter how rare an event may be, if no gods were involved, it is merely a coincidence, not a miracle. When it all comes down to it, all the probabilities in the universe are determined by the convergence of waves and particles. It's said that god is in the details, but unless gods exist in quantum gaps―the space between Planck lengths―they are no better than random number generators. For this Sanae, gods do not exist.