Ondangata Heisoku Zensen (a Touhou LW original) refers to warm occlusions that occur when a cold front overtakes a warm front and rides over the cooler air mass ahead of it. This is an apt temperament for Merlin as her music excites the mind and soul. Merlin is endowed with Metal Phase, the element of brass instruments, and Sun Essence, representing her alluring and radiant nature. 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 alluring and arrogant Sun Essence resists the diverse and uncooperative Star Essence, but it is weak to the cooperative and indecisive Moon Essence.

The ability of Merlin Prismriver from the world shrouded in scarlet mist (a Touhou LW original). It is essentially the same as our version of Merlin's ability. As of yet, there aren't any reliable records of the Prismriver Sisters doing anything significant around the time of the Scarlet Mist Incident. It is assumed that the sisters of this world performed their own investigations into the incident. However, some people doubt that they even exist at all. Of course, this isn't all that unusual since Gensokyo is built upon the absurdity stemming from the fictitious nature of all youkai, apparitions, and spirits. Layla Prismriver's spell must have been incredibly powerful if it is truly what created the poltergeists and continues to sustain them. Powerful enough to establish a new universal rule transcending the karmic cycle to which all things are bound. It is not only living creatures trapped in the cycle of transmigration, evidenced by how the air never stays in one place and how the land continues to slowly die and be reborn as it rides the mantle convection currents. Even the stars in the night sky spin through a continual cycle of dying out and igniting. The karmic cycle is one of the fundamental rules that dictate how the universe operates. While some beings like hermits and celestials may appear to exist outside this cycle, they are merely running away from it. It will eventually catch up to them along with its shinigami enforcers. As seen with the ghost Yuyuko Saigyouji and the people of Hourai, only truly exceptional circumstances can release someone from the karmic cycle. In saying that, it is theoretically possible that the poltergeists are one of these exceptions if the spell was powerful enough. It was probably this world's Yukari Yakumo who suggested that this would make the Prismriver Sisters excellent candidates to investigate the other worlds. Be it the vacuum of space or the depths of the ocean, you have to be tough and durable to investigate extreme environments... especially if you are expected to return with your findings. Eiki and Yuyuko only truly understood why Yukari made this suggestion later on when they learned that the cause of the incident was not in their world and that Yukari had known about the other worlds from the very beginning. Indifferent to the suspicious discussions held by the people who sent her, Merlin Prismriver, the special incident investigator, happily embarked on her mission. Even among her sisters, she was particularly cheerful. She was sure she could overcome any obstacle as long as she had her music and kept a positive attitude. And she was right, more or less, even if she never imagined that they could travel to another world. It had always bothered her, but this experience forced Merlin to really examine why happiness and music can forge such strong bonds between people. After thinking back on her time spent with Layla Prismriver, she managed to form the vague hypothesis that it had something to do with how sound is a wave and how waves can resonate with each other.