Satan Who Art As Lucifero (ルチフェロなりしサタン, Luchifero-narishi Satan?), whose real name is obscured, is a figure who Ashiya Douman reports to after the events of Shimousa in Fate/Grand Order: Epic of Remnant. It is unknown if Satan is related to the Alien God behind the events of Cosmos in the Lostbelt.
Details of the figure are unknown. His name is censored as "*********", and Douman's joking nickname of "Satan" is somewhat related to his true nature.