Lucifer Morningstar

"So tell me. What is it you desire?"

- Lucifer Morningstar to Mia Smoak

Lucifer "Luci" Morningstar, also known as The Devil, was a club owner in Los Angeles and a powerful ruler of Hell.

Early life
Presumably in ancient times, Lucifer became known as the Devil. He later found his way to Earth-666. At some point, Lucifer met John Constantine, who helped him with an ordeal regarding Maze.

Favor for John Constantine
Later, Lucifer repaid his debt to John when the latter, Mia Smoak, and John Diggle found him in a bar. Lucifer gave John a card to enter purgatory for a limited time.

Powers

 * Desire revelation: Lucifer has the ability to make people reveal their deep desires.
 * : After Constantine, Mia, and Diggle did business with Lucifer, the latter referred to the three of them as mortals, presumably meaning that Lucifer is immortal.

Former equipment

 * Timed purgatory teleportation card: Lucifer gave John Constantine a card that transports presumably any desired number of individuals to purgatory for a short time. It is a card with an illustration of a devil playing the piano with the words "The Devil" at the bottom. Once the picture completely fades, the soul(s) of the user(s) will be completely decimated and trapped there for eternity.

Trivia

 * In DC Comics, although the senior member of the Triumvirate of Hell, the First of the Fallen, aka Satan, is sometimes confused with Lucifer, Satan and Lucifer are two different entities.
 * It is unclear whether Earth-666 and Earth-1 have separate Hells or if the Triumvirate came to power after Lucifer abdicated, as in the comics.

Behind the scenes

 * Tom Ellis confirmed in an interview that Lucifer's appearance in happened during the 5-year gap in between Lucifer coming to Earth and when the Lucifer series begin.
 * The card with an illustration of the Devil playing the piano is a reference to Lucifer's expertise as a pianist.