The Scarlet Devil Mansion is inhabited by Remilia, the maid Sakuya, the gatekeeper Meiling, and your friend Marisa. Patchouli and Koakuma are both in the Library. Flandre lives in a room in the basement. There are numerous fairy maids constantly working around the house.

Due to your size being shrunk to that of a speck, the women within this mansion are all extremely huge in comparison to you, and they will often mistake you for an insect. If they notice you, they will play with your tiny body.