 3D CGI was used in the creation of certain backgrounds and settings for the series, such as the Hall of Mirrors.toi8 of Studio 4°C took on the role of designing the weapons and props for the series.He utilized different reference materials for his designs, saying that he "relied on images in books and on the web" as well as films such as "Fanfan la Tulipe" and "The Affair of the Necklace".