Satan (Alternatively known as The Devil) is an immortal of indeterminate origin and is one of the Powerful Beings.
Satan was one of the first Powerful Beings to emerge Post-Fold, and is responsible for constructing the foundations of Neo-Francisco in a complex pattern around his place of power, an enormous Black Obelisk found in Tottori-Arcana that reaches high above the Flattened Sphere. In addition to drawing up the treasures of the Flattened Sphere from the depths to construct Neo-Francisco, Satan is also notable for being one of the most reliable sources of information regarding the Pre-Fold world.
Very few have seen Satan in person since the Fold, but several experts in Pre-Fold Sculpture can confirm that Satan is "super hot, like ridiculously hot." Most modern media depicts him as wearing a black suit, and, by Satan's own request, bearing a striking resemblance to someone Satan vehemently insists is Pre-Fold Actor David Boreanaz.
Over the years, several documents have emerged detailing the origins of Satan. One suggests that Satan was once subservient to another Powerful Being, referred to as God, who cast down Satan, at this point called Lucifer, for seeking a promotion to counteract God's mismanagement of their corporate entity, which is usually referred to as Heaven. Satan then started his own corporate entity with like-minded compatriots, branding it Hell, which quickly overtook Heaven in popularity and became the primary purveyor of rock music and narcotics in the Pre-Fold world. Satan's history prior to his founding of Hell is unknown, leaving much unclear about the Being's early life and career at Heaven.
After the Fold, Satan arrived in the deserts that would eventually became Tottori-Arcana and became pulling the treasures of the earth to the surface, constructing his Black Obelisk and the foundations for later construction in an arcane pattern that drew power to their creator. As Neo-Francisco grew, all future construction in the city was forced to pay tribute, primarily in Pre-Fold artifacts, to Satan himself for the privlidge of building upon the foundations that he had raised, while furthering his greater plan of establishing his magical dominion over the city. The artifacts paid in tribute to Satan become part of his massive museum collection within the Black Obelisk, which include, but are not limited to, priceless works of art (The Mona Lisa, Goya's Black Paintings, and the original Coca-Cola logo), cultural artifacts from across the world (The manuscripts of William Shakespeare, the sarcophagus of Tutankhamun, and every known copy of Pink Floyd's "Dark Side of the Moon"), and even several inexplicably alive pre-fold celebrities (Jiro Ono, Snoop Dogg, and Adam Sandler).
With his power buoyed by the arcane patterns of Neo-Francisco, Satan has primarily withdrawn from public life, isolating himself at the highest level of his Black Obelisk. Making regular contact with The Moon, he furthers some greater agenda, as of yet unknown to all other life. When not pursuing his infernal goals, Satan makes regular trips through the many levels of the Obelisk, tweaking the presentation of each of the themed rooms to accommodate new artifacts he's acquired, assuring that each person's journey through his tower is unique.