Kaguya Houraisan

General: Kaguya has a rather carefree personality, as she often sneaks out to visit the human village. She apparently is refined in the art of conversation, but her vocabulary is a bit dated. She is also described as haughty and relatively wild. She was once a princess of the Lunarians, a race of people living on the Moon. For the crime of creating the Hourai Elixir, she and Eirin Yagokoro were exiled to the Earth, where they came to live in what would eventually become Gensokyo. She is currently the princess of Eientei. Eientei is currently occupied by a large group. Kaguya Houraisan and Eirin Yagokoro have been hiding there since their exile from the Moon. Other occupants include rabbits, lots of them, all under the command of Tewi Inaba and Reisen Udongein Inaba, who protect Kaguya and Eirin from intruders.

It is unknown to the majority of Gensokyo that the residents of Eientei are from the moon.[2] Eientei's residents[3] and the few nonresidents who do know are keeping it a secret.[4] Youkai are apparently aware that Reisen is from the Moon (who proclaims it)[5], but the humans from the Human Village may not be.[6] The average human and youkai know Kaguya as the princess of Eientei and its mistress.

Every month on the night of the full moon, the residents of Eientei hold a Moon Festival (例月祭 Reigetsusai), offering mochi with medicinal herbs pounded into them. Making mochi is thus the main occupation of the Earth rabbits. Eientei has also hosted a lunar expo at least twice, showcasing objects from the Moon. Items include the American flag placed on the moon (confiscated from the Three Fairies of Light),[7] moon rocks, an ox cart used to be able to fly long ago (but now is pulled by an actual ox), a kimono that shines, a lunar rover and many other relics.[8]

Both humans and youkai may come to Eientei for Eirin's medical services. Fujiwara no Mokou often provides escort through the Bamboo Forest of the Lost. In Alternative Facts in Eastern Utopia, Eientei group's service providing medicines is called "Hourai Pharmacy".

appearance: Kaguya is shown to have dark brown eyes and very long black hair in a hime cut style. She wears a pink shirt with many white bows, and a long, dark burgundy skirt decorated in plants and flowers representing the four seasons. Respectively, they are cherry blossoms, bamboo leaf, maple leaf and plum blossoms. Her 5 Impossible Requests are seen floating around her, probably waiting for her order to engage in a spell card attack.