|“||Your return to the underworld has been requested!||„|
|“||I'm just realising the gravity of what you're saying. That even if you don't choose hell all I have to do is wait for some pityful thug to end you, and right back to hell you go! You hadn't put that one together, did you, Lucy? You just made my millennium||„|
|~ Amenadiel to Lucifer, realising how to get him back to hell|
He is portrayed by DB Woodside.
5 years prior to the start of the series, Lucifer left Hell, forcing his brother Amenadiel to take his place, fighting off demons to prevent them from escaping.
He has been sent to the mortal world by God to convince Lucifer to return to hell, visiting Lucifer in his club, but to no avail. He tries to use Lucifer's companion and friend Maze, a demon who is fed up with Earth and would rather return to hell with Lucifer, to bring Lucifer to return, but Lucifer finds out and has a falling out with Maze. After this plan fails, Amenadiel returns to earth in the shape of a human and gains the trust of Lucifer's psychiatrist to find a weakspot of his brother.
Lucifer and Amenadiel team up at one occasion to get back Lucifer's wings which have been stolen. During that time Amenadiel finds out that Lucifer's time in the human world has made him mortal. Realizing that this would mean Lucifer would return to hell in case of his death, Amenadiel gleefully tells Lucifer that he just "made his millennium".
Knowing that Lucifer would return to hell should he be killed, Amenadiel devices a different plan which involves the corrupt police officer Malcolm Graham, who had been shot while meeting up with some gang members and fell into a coma for months. Once it is decided that Malcolm wouldn't return, Amenadiel watched the hospital staff deactivate the instruments keeping Malcolm alive. After letting Malcolm have a good taste of how eternity in hell would feel like, Amenadiel revives the officer, much to the delight of the man's family.
He later reveals himself to Malcolm and tells him to kill Lucifer, otherwise Amenadiel would take the life back from Malcolm and he would be doomed to hell. Although Malcolm at first decides to enjoy the pleasures of his new life, Amenadiel eventually meets up with Malcolm, intimidating him enough to make him promise that he'll kill Lucifer. However, Lucifer manages to talk him out of it by giving him a coin that could get him out of hell. Meanwhile, Amenadiel converses with Maze about Lucifer, and reveals to her that he was the one who told people that the Devil looked like a goat-beast, which they both laughed at. They later had sex in a car.
To get back into Luicifer's good graces, Maze deduces Amenadiel once again and plans to kill him while he is asleep. However, she doesn't go through with it and Amenadiel wakes up. Realizing that Lucifer sent Maze and that Malcolm hasn't gone through with it, Amenadiel heads to Lucifer's apartment to kill him himself. Lucifer, on the other hand, is fed up with Amenadiel's manipulation. A brutal fight ensues in which most of Lucifer's apartment is laid to waste. The fight only stops when Maze arrives and, angry that both used her against the other, leaves her two daggers, stating that both should use them to kill each other. Both realizing what their anger has driven them to, the two brothers stop fighting and Amenadiel leaves the room without another word.
Amenadiel then saves Lucifer from being arrested at Lux for the murder of a priest whose body is found on the club floor. He tells Lucifer that he hadn't done that, but Malcolm had, and he must be sent back to Hell if their conflict is to fixed. They eventually have a three-way conversation with the therapist Linda Martin, which leads to the brothers uncovering a new clue leading them to Malcolm; the fact that he will need a new identity and a fake ID in order to escape Los Angeles without intervention. They confront funeral home director Neil Palmer, and so they learn from him that Malcolm is after $100,000 from a gangster who owes him. Upon learning this, they find the gang and proceed to stand before the gang's weapons; however, they are easily able to dispatch them using their supernatural strength and immortality. Amenadiel is stabbed in the chest by Malcolm, who had a blade that was forged in the fires of Hell, and runs off, with Maze being forced to take the mortally-wounded angel to Lucifer's apartment. Though Amenadiel said he was content with death, wherever he may go, Maze still manages to save him using a feather from Lucifer's destroyed angel wings; she puts the feather upon the wound, causing a bright yellow light to come off of the feather. At night, Amenadiel is still at Lucifer's apartment, and says that he must still find Malcolm; however, Lucifer gleefully reveals that Malcolm is dead, the Pentacostal coin he was given has been used up and he actually spoke to God. Amenadiel realizes now that He wanted Lucifer to stay behind on Earth to fulfill a task, and so the Devil reveals that someone escaped Hell while they were pre-occupied, and now their Father wants the demon sent back; when Amenadiel asks Lucifer who escaped, he reveals that it was their mother who escaped.
The full extent of Amenadiel's powers is not currently documented, but he is known to be less powerful than Lucifer. As an angel, he is still more powerful than the demon Maze. As an angel, he is very powerful and possesses many abilities, among them being the ability to slow down time, demonstrated when he enters a place where mortal eyes can see his wings extended. As an angel, Amenadiel cannot be killed by conventional means, and has thus lived for many millennia; however, he is not truly immortal (see Weaknesses below for more). He also possesses great strength, and is far stronger than that of a human being, able to throw people back several feet, and also possesses great reflexes, able to effortlessly dodge the attacks of Maze. He is capable of altering his true angelic appearance, making himself look like a human male (hiding his wings), and he even claims to be quite comfortable in his human form. It is assumed, however, that other angels can see Amenadiel's true, angelic appearance, even when he's in his human form.
- Wings: The feathers of Amenadiel's angelic wings seem to be very sharp, as shown when he threatened Lucifer.
- Flight: Through the use of his wings, Amenadiel is capable of flying.
- Resurrection: When a dying Malcolm was taken off the machine, Amenadiel seemed to bring him back to life from his ward window.
- Nigh-Omniscience: Amenadiel possesses an almost infinite amount of knowledge, due to him being very old.
- Expert Combatant: Amenadiel is a highly skilled hand-to-hand combatant, able to swiftly gain the upper hand against the demon Maze in a duel, even mocking her.
- Demon Weapons: In "Take Me Back to Hell", it is shown that demon weapons can cause fatal injury to an angel when Amenadiel is stabbed with one of Maze's knives by Malcolm.
- Angels: Other angels can hurt Amenadiel, as stated by Lucifer in "#TeamLucifer".
- "Lucifer, Stay. Good Devil."
- "Manly Whatnots"
- "Sweet Kicks"
- "Favorite Son"
- "Et Tu, Doctor?"
- "A Priest Walks Into A Bar"
- "Take Me Back To Hell"