Eijitsu (a Touhou LW original) refers to a subsun, an optical phenomenon that appears as a glowing spot below the real sun. This is an apt temperament for this world's Mokou, a phoenix who has fallen to the ground. For some reason, it seems to be highly restrained due to interference by the colossal system of the Capital. This temperament is specialized to solely resist Moon Essence.

The ability of Fujiwara no Mokou from the Lunar Base (a Touhou LW original). It's unclear whether her ability is the same as Mokous' from other worlds. To determine that, one first needs to understand the deep connection between her and the colossal system of the Capital. Ultimately, however, her immortality as a person of Hourai is unchanged from that of other worlds' Mokous. It may or may not be the same ability, but she's immortal nonetheless, meaning the mechanism behind her immortality may also differ. Humans are formed from a body and a soul, with the body ensuring their mortality. However, the soul allows them to traverse a fate beyond death and be reborn. Ordinary humans require both a body and a soul. A person of Hourai is someone who has gained immortality by drinking the Hourai Elixir. At this time (across all worlds), the following are the only known people of Hourai: Chang'e, Eirin Yagokoro, Kaguya Houraisan, Xu Fu, and Fujiwara no Mokou. It's theorized that the elixir works by combining the dual system of body and soul into one, meaning that people of Hourai have shed their original bodies and instead possess a body that has been merged with their soul. They are no longer a body and a soul―their soul IS their body. It's said their souls are indestructible, and this is probably because their souls have been given directivity, which ensures their temperament remains concentrated in one location rather than dispersing. It can be likened to a magnet or shape-memory alloy, but one could also say the fundamental particles that come together to form temperament are each embedded with memories. It's almost like genetic engineering has been performed to internally mark each particle with an identifying mark. It's also believed that memories stored in temperament are what fuel dreams, so no matter how far dispersed the temperament particles become, their need to cluster with similar particles returns them to the body from which they originated. This mechanism also staves off slowly accumulating and irreversible changes like old age and illness. It seems that only one with unprecedented genius and the ability to manipulate both eternity and the instantaneous could've created the mechanisms behind the people of Hourai's immortality. This world's Fujiwara no Mokou is undoubtedly a person of Hourai. But there's something different about her. Over her many years of fighting, her body has been destroyed and regenerated countless times. Her being should remain unchanged… and yet, she has changed. Maybe it's because of fatigue from battle. Or perhaps her changing is proof that the heart and mind are separate from a person of Hourai's soul. She cannot afford to flee from this fight, but fighting on is too much for her to bear. Without a heart, would she not suffer less? For now, one can only wait for her to open up. Just what took place between her and the Capital?