The Scarlet Devil Mansion is a fictional location from the Touhou Project series, created by ZUN. It is known for its grand architecture and is situated in a secluded area, surrounded by a forest. The mansion serves as the residence of Remilia Scarlet, a powerful vampire, and her younger sister, Flandre Scarlet. Inside the mansion, various supernatural beings and creatures reside, contributing to its mysterious atmosphere. The mansion features a library, a ballroom, and a garden, all of which are often depicted in the series. It plays a significant role in the storylines of several Touhou games, showcasing themes of fantasy and adventure.