O-Ushiza Minami Ryuusei (a Touhou LW original) refers to the Southern Taurids meteor shower. This is an apt temperament for Star Sapphire, who, after everything is said and done, is a remarkably cunning fairy. She is endowed with Wood Phase, due to her bunny disguise, and Star Essence, the temperament of stars. The strong and kind Wood Phase resists Water Phase, because water nourishes wood, but it is weak to Metal Phase, because metal carves wood. 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 Star Sapphire from the world of eternal night (a Touhou LW original). It doesn't appear to be any different from Star's original ability. Apparently, the Bamboo Forest of the Lost in Gensokyo used to be called Takakusagun, and it is the domain of Tewi Inaba, the oldest rabbit who dwells there. Star, Luna, and Sunny once played a game of catch the bunny in this forest. However, in this world, they visited it much earlier. Or maybe it just seems that way because the Eternal Night Incident has been prolonged. Regardless, there's something in or about this forest that causes people to lose their way. Is it the youkai rabbits or fairies in the forest playing pranks, or has the natural geography turned it into a maze? Or maybe the cause is supernatural, like someone manipulating wavelengths. Fairies love gossip, so their heads tend to be full of nonsense, but since they are exceptionally long-lived and can be found anywhere in Gensokyo, they sometimes know things that others don't. For example, the fairies know that Takakusagun ended up in Gensokyo because the forest itself became lost in space and time. They've also heard a rumor that the Forest of Magic is, in fact, an enclave of Makai! But that one might not be true... Perhaps they also know that the bamboo forest was where Mizuchi Miyadeguchi was tragically ambushed by youkai. But then why don't they talk about it? Is it because it's not such an unusual occurrence? Mokou has also been attacked by more than a few youkai who wanted to eat her liver... What about the other occupants of the bamboo forest? Do the fairies know about the mysterious fire-conjurer that wanders about or the strangely docile wolf girl? Regardless, even if they knew all these things, there was one thing they had no knowledge of: Eientei. Eientei was cut off from history, making it impossible to find. Eirin did this to hide Kaguya from the Lunar Emissaries. However, it seems that whatever she did, it didn't completely isolate them. Reisen, a runaway rabbit from the Moon, managed to find and enter Eientei. And despite being in hiding, Kaguya knew that Mokou was wandering around the bamboo forest and sent assassins after her. So she must have had some way to contact either visitors to the forest or its denizens. This is probably because Eirin's Astronomical Cover-Up spell is affected by the waxing and waning of the Moon. Just like how caves or paths can be hidden by the tide, there might be specific times when it's easier to sneak in or out of Eientei. Star Sapphire wandered into Eientei, a place that shouldn't exist. If there was a mansion in the Bamboo Forest of the Lost, she would have heard about it. Perhaps it had something to do with the night that never seemed to end. Sunny and Luna got scared and ran away, but Star was fascinated. Maybe it's because she's the fairy of starlight, but it felt like the mansion's cosmic aura was calling out to her. She instinctively knew that whatever this mansion was, it was going to be fun. When she stepped inside, the first thing she saw was rabbits busily pounding mochi, and a whole swarm of fairies imitating them. The big youkai rabbit, who looked more like a human, seemed to be the leader. She switched between barking out instructions and livening up the mood with her mischievous grin. Star still didn't know what this place was, but surely they wouldn't mind if she helped herself to some mochi.