Taikyo (a Touhou LW original) refers to the sky as well as the great void where yin and yang originate. This is an apt temperament for Youmu, who straddles the line between human and phantom. Youmu is endowed with Metal Phase, the element of swords, and Star Essence, because she is impressionable. The cold and silent Metal Phase resists Earth Phase, because earth bears metal, but it is weak to Fire Phase, because fire refines metal. The diverse and uncooperative Star Essence resists the cooperative and indecisive Moon Essence, but it is weak to the charming and arrogant Sun Essence.

The ability of Youmu Konpaku from the world shrouded in scarlet mist (a Touhou LW original). It is essentially the same as our version of Youmu's ability. The reliable records hardly mention this world's Youmu, so most of the following information is hearsay and could very well be false. However, that is all the more reason why she should be investigated and studied. Even made-up stories have real meaning behind them. Yuyuko Saigyouji deftly acted in the shadows and in the open, trying to deal with the never-ending Scarlet Mist Incident affecting Gensokyo. Her efforts were on par with her best friend, Yukari Yakumo. Yuyuko is incredibly intelligent and perceptive, and to top it off, she is almost immune to stress thanks to her independent and headstrong attitude. It could be said that if anyone could stand up to Yukari Yakumo, it would be her. Youmu Konpaku is a half-human, half-phantom swordswoman who serves Yuyuko. Unfortunately, she isn't exactly the sharpest tool in the shed. The mist gradually altered the landscape of the Netherworld over the course of a year, eventually affecting the phantoms there... Yuyuko had to make a decision of whether they would accept these changes or fight against them. Fearing for Youmu's safety, Yuyuko purposefully filled her head with scary stories. She made Youmu believe that the land of the living was a scary and dangerous place full of spooks, monsters, and mist. Yuyuko was sure this would prevent Youmu from venturing down to Gensokyo on her own, which was truly a dangerous place. However, contrary to Yuyuko's expectations, the trembling and terrified Youmu drew Hakurouken and suggested that they exterminate the spooks. Hakurouken is a sword that has the power to slice through doubts and enlighten those it cuts, forcefully removing them from the cycle of reincarnation. It sounds like it would be extremely effective at slaying undead fate-manipulating monsters, but Yuyuko doubted whether the vampire was truly the mastermind behind all this... While Yuyuko was still trying to decide what to do, she was visited by the god of chickens, who regularly traveled between Hell and Gensokyo. She came bearing orders from the Yama. The Yama wanted to enlist Yuyuko's help to investigate what was happening in Gensokyo because she was worried about the mist that was starting to seep into Hell. The mist would cause untold harm if it ever covered Hell in earnest due to the peculiar magic it was imbued with. This magic could affect the souls of the dead, the oni who manage Hell, and even the Yama herself... According to the Yama's observations, the mist seemed to be a condensed mass of some kind of temperament, similar to phantoms, clearly indicating that someone designed it this way on purpose. This worried the Yama and Yuyuko even more... but Youmu was still as clueless as ever.