Iryuugiri (a Touhou LW original) refers to the mist that forms when warm air moves over cold ground or water. This is an apt temperament for Remilia, who continues her long journey to end the Lost Word Incident. Remilia's temperament has been completely reconstructed. She cannot avoid her weakness to the light of day (Sun Essence), but the light of night (Moon Essence & Star Essence) is her ally.

The ability of Remilia Scarlet, who has almost reached the end (a Touhou LW original). Remilia 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. Remilia didn't just lose her ability to the Lost Word―her entire existence was erased. That is the end brought about by the Lost Word Incident, and Remilia's fate proves that this end is unavoidable. However, she has returned. She came back from a husk filled with perfect nothingness. How did she do it? She shouldn't have been able to feel or think. But a scarlet light, no, a scarlet darkness, shone into that husk. Through that, she heard the voices of those closest to her. She saw the shadows of those she loved. Her ability that should have been lost forever was reborn anew when she touched the hot trail of fate with her fingers. If her purpose is to reclaim a missing word, then she can reel in the threads of fate, grab them tightly, and pull herself up. Nothing can stop her from doing this. That is the sole difference between this ability and her old one. Gungnir Muspelheim: This is the altered form of the Scarlet Devil Mansion that Remilia reclaimed. It is not the physical Scarlet Devil Mansion but a concept composed of memories carved into the Scarlet Devil Mansion. It is similar to a Spell Card. Even though it is just pure information, it appears to have volume and mass because there is so much densely compacted information. The only explanation for this phenomenon is that all the memories engraved into every single world's Scarlet Devil Mansion have surpassed the barriers between worlds to coalesce into a single form. It is possible that this high information density has elevated the consciousness of this object to the level of humans and youkai, making it a sentient weapon. However, it cannot speak. Gungnir Muspelheim is similar to tsukumogami and some unique magic items, but it is a fundamentally different being.