Remilia Scarlet (レミリア・スカーレット Remiria Sukāretto) is the main antagonist of Embodiment of Scarlet Devil. She's a vampire and the owner and head of the Scarlet Devil Mansion, the mistress of Sakuya Izayoi, Hong Meiling and the fairy maids. She's also the older sister (and guardian) of Flandre Scarlet.

While she tries to cultivate the image of a mysterious and frightening vampire aristocrat, Remilia is as childish as her appearance suggests. However, she is surprisingly polite. Garlic stings her.