Eienteis

Eientei is a fictional location that appears in the Touhou Project series of games. It is a mysterious and often isolated mansion, usually situated in a bamboo forest. The mansion is home to several prominent characters within the Touhou universe, including Kaguya Houraisan and Eirin Yagokoro.

The exact nature and location of Eientei are often ambiguous, contributing to its enigmatic reputation. It is known to exist in a realm separate from Gensokyo's more populated areas, and its inhabitants possess unique abilities and knowledge. Kaguya Houraisan is a princess from the moon who was exiled to Earth and resides in Eientei. Eirin Yagokoro is a sage and a master of medicine, who acts as Kaguya's caretaker and advisor. Other residents have also been associated with Eientei in various installments.

The mansion itself is often depicted as a place of great beauty, with traditional Japanese architecture and serene surroundings. However, it can also be a place of illusion and danger, as its inhabitants are powerful beings with their own agendas. Eientei serves as a significant plot location in several Touhou games, often acting as a place where the protagonist must confront its residents to uncover secrets or resolve conflicts. Its presence adds to the rich lore and diverse settings of the Touhou Project.