Kamu (a Touhou LW original) refers to a flower fog, the phenomenon where a bunch of flowers can look like a colored mist when viewed from afar. This is an apt temperament for this Yuuka, who woke up earlier than planned. Yuuka is endowed with Wood Phase because she loves flowers. The strong and kind Wood Phase resists Water Phase, because water nourishes wood, but it is weak to Metal Phase, because metal carves wood. Flowers absorb colors from the earth, and color holds the same properties as temperament. Yuuka can use this characteristic of flowers to influence her own temperament. She has chosen to give herself Reverse Sun Essence to help her resolve this incident that was apparently caused by a vampire. The alluring and arrogant Sun Essence resists the diverse and uncooperative Star Essence, but it is weak to the cooperative and indecisive Moon Essence. Thus, Reverse Sun Essence is weak against Star Essence and resists Moon Essence.

The ability of Yuuka Kazami from the world shrouded in scarlet mist (a Touhou LW original). It is essentially the same as our version of Yuuka's ability. Similar to Alice Margatroid, there are no public records of Yuuka Kazami being active during the Scarlet Mist Incident. In other words, it's like all the information concerning this Yuuka comes from myths and legends rather than from a history book. Although the Scarlet Mist Incident has been prolonged, the only evidence indicating that Yuuka was active during this time comes from this Yuuka herself and the people around her. It would be much easier to believe that this Yuuka actually existed if an impartial witness could back up what she says. But, then again, the proof of someone's existence can only be expressed in relative terms, so you can never know whether any specific individual truly existed with absolute certainty. Just like Alice, this Yuuka claims that she wasn't planning to wake up until her time had come. But Yuuka loves flowers, so she awoke when she sensed that an incident was threatening them. Basically, this incident gave Yuuka a more than sufficient reason to act because its mist blocked out the sun, endangering the plants and stunting their growth. However, according to Yuuka, she woke up too early. It's true that most records state that Yuuka was first seen in Gensokyo around the time of the flower incident that hasn't yet occurred in this world, but how could this Yuuka know about that...? She speaks as if she predicted the future. Yuuka Kazami is a youkai who manipulates flowers. There are several famous types of youkai, such as kappa, tengu, yuki-onna, and yamanba, but Yuuka hasn't claimed to belong to any particular species of youkai. This harkens back to the fundamental nature of youkai. Broadly speaking, any being that isn't human can be called a "youkai." The term "youkai" was first used as a way to categorize beings like kappa and tengu, rather than the terms "tengu" or "kappa" being used to distinguish certain types of youkai. Kappa used to just be called kappa, and the same with tengu. The only thing they have in common is the fact that they're not human. Of course, other non-human beings, such as wild animals, also exist, but they stop being called youkai as soon as they are identified as natural creatures―creatures that can be controlled or have the potential to be controlled by human logic and knowledge. Youkai have always existed alongside but separate from humanity and should really be considered generally as "non-human creatures" rather than lumped together under different labels. The closer you get to the original definition of the term "youkai," the more it resembles the definition of oni. Perhaps this is why some people consider oni to be separate from youkai.