Scarlet Devil Mansion (often abbreviated to SDM) is a prominent place in Gensokyo. The owner of the mansion is Remilia Scarlet, and the residents include Flandre Scarlet(her sister), Sakuya Izayoi(head maid), Hong Meiling(door guard), Patchouli Knowledge(head librarian),and Koakuma(assistant librarian.) There is also a large number of maids, and possibly other staff like cooks ect. The mansion has a large library (where Patchouli knowledge tends to reside) and a basement (where Flandre Scarlet resides). A bodied Yukkuri Remilia(or a whole group of them) lives in SDM and is pampered by Sakuya.