- Alas, Poor Scrappy: Ibriel and Cal, the latter of which happens twice. And Mahu, Zonaquel and Remiel.
- Alas, Poor Villain: Cestis, who becomes Elaine's father (after eating the original).
- Alternate Character Interpretation: The final scene of the comic is subject to much interpretation. Lucifer leaves the universe to be off by himself for all eternity after a conversation with the Old God about enlightenment. The thing is, Lucifer explicitly rejects the comparison and abandons his seeming loved ones. Some have seen this as a metaphor for Lucifer growing up and being mature. Others see it as showing Lucifer is so pathologically immature he can't stand to be around anyone now since contact with other people makes you dependent on them. I.e. he actually got worse rather than better.
- Base-Breaking Character: People are split on how wildly different the 2019 series is to the original comic's run. While the original Mike Carrey series portrayed Lucifer as an amoral being who only ever came after you if you were a direct threat to him or his assets and never had to suffer any lasting consequences for it, in 2019 The Sandman Universe run he is portrayed closer to a more conventionally evil Devil who is more likely to torment humans for his own gain and suffer a Pyrrhic Victory from the fallout it causes. While fans think that this change missed the point of what made Lucifer Morningstar so intriguing, others find the idea of Lucifer's behavior being portrayed as self-destructive and actually having to consider his actions makes him intriguing an a whole new way. Really it depends on who you'd want Lucifer to be: an Übermensch who's Above Good and Evil, or a Byronic Hero who is just as much a villain to himself as he is to the rest of the Universe.
- Character Rerailment: The 2019 The Sandman Universe design for Lucifer is done in a David Bowie-esq beautifully androgynous design that Neil Gaiman originally intended compared to the more conventionally handsome portrayal in the Mike Carrey series (and its Holly Black continuation).
- Complete Monster ("The Wolf Beneath the Tree" & "Morningstar" arcs): Fenris is the Nordic Beast of the Apocalypse and the self-proclaimed ruler of "everything that ravels, rapes, and rends". Following God's abdication of His throne, leading to the slow unraveling of the universe, Fenris decided to take a personal interest in speeding up the process. Murdering several other Norse gods whom he'd previous claimed he'd made peace with, Fenris takes control of a mentally ill man and tries to force him to murder his wife and son among the roots of Yggdrasil, which would render the destruction of the universe inevitable. When this plan fails, Fenris murders his accomplice, the African trickster god Abonsam, and uses his blood to take control of Lucifer and kill his brother Michael, watering the tree with his blood. In the final arc, Fenris joins Lilith's alliance of past villains, eviscerates the Archangel Uriel, kills the noble human Hell-Lord Christopher Rudd, and destroys God's throne, which would have immediately destroyed the entire cosmos had God's granddaughter, Elaine Belloc, not agreed to succeed him.
- Damsel Scrappy: Rachel and Mona (though Rachel is also this by virtue of being a loud, bratty Jerkass). Elaine at first, but she got over it.
- Foe Yay: Rudd and Lys, after the break-up, though they may be more of an ongoing Masochism Tango. Also Lucifer and Izanami at the end.
- And then there's Cestis and Mazikeen.
- Exiled from Continuity: By virtue of being a spinoff of a Exiled from Continuity title, since DC superheroes and the world of Morpheus and Lucifer can't touch or interact without cheapening one or the other. Lucifer has had a few cameos.
- Ho Yay: Jayesh/Karl, which ends up being canon.
- Jerkass Woobie: Lucifer is a bastard... but he spends his entire existence striving for things he can ultimately never have, and his father is an even worse person than he is.
- Magnificent Bastard: Lucifer Morningstar is the endlessly proud, brilliant and dangerous Devil. Seeking his freedom from creation, Lucifer deals with endless threats to his new Creation and his safety, constantly outplaying and destroying them. Even in places where he is powerless, such as the Japanese underworld Yomi, Lucifer sees through every trap against him and defeats his supposed hosts. When struck down by another trap, Lucifer returns to life by manipulating his niece Elaine Belloc into sacrificing her life for him and promptly outsmarts and destroys the angel Amenadiel who seeks to destroy him when he is still recovering before returning Elaine to life to repay his debt. Pursuing his freedom from all Creation, Lucifer constantly demonstrates why he is the king of manipulation, second only to God himself.
- Memetic Mutation: Eventually used as part of the "Good Guy Lucifer" advice animals.
- Rescued from the Scrappy Heap: Rachel gets much better in her later appearances.
- The Scrappy: Arabelle Crane from the 2015 series is disliked for being a poorly done Gender Flip of John Constantine, without the charm or good intentions.
- Scrappy Mechanic: If you're the sort of person who tries to decipher it, Mazikeen's slurred semi-legible speech quickly becomes very irritating. Which is probably why Mike Carey had Jill Presto "repair" Mazikeen's face at the first opportunity; he wouldn't have had much attachment to the whole gimmick, since it was Neil Gaiman's invention.
- Tear Jerker: About half the death scenes, even when the characters get better, not helped by the large number of woobies; also the relationships between Jayesh and Karl, Rudd and Lys, and Elaine and her foster parents, and the fates of a number of characters you wouldn't expect to miss, or even actively loathe. Let's not even get started on the break-ups.
- Especially the note Karl finds at the end of The Wheels of God story arc in Morningstar. "He knows. He has always known."
- They Changed It, Now It Sucks!: The 2015 comic series undoes a lot from the old one, including turning the Bittersweet Ending into a Status Quo Is God sort of middle. This has drawn quite a few complaints.
- They Wasted a Perfectly Good Character: Takehiko, who exists solely to kill his father, Lucifer, ultimately doesn't get much to do apart from fall for Rosemary and fail to do anything to Lucifer at every turn.
- They Wasted a Perfectly Good Plot: In the 2015 series. A mad God who's turned Omnicidal Maniac and has brainwashed an army of angels and demons? Awesome. A mad God who's turned Omnicidal Maniac turning out to have a Weaksauce Weakness and killed off without much effort? Not so much.
- The Woobie: Caliban in the new series. He has Abusive Parents who neglect him on top of everything else they do, he starves for a great deal of his life, often living on the streets and being beaten for his deformities. When he finally reunites with his parents, they're far too concerned with their own plans (even if Lucifer's is well-meant) and egos to really notice him - and when his angelic family comes to see him, he's so distraught by the contrast between their beauty and his ugliness that he begs to be made into one of them. And then he's killed because Sycorax and Mazikeen decide to toss the Idiot Ball around, leaving him to die in Lucifer's arms. At least the poor thing seems to be content in the afterlife, where he no longer has the need to be ashamed of himself just for existing.
YMMV / Lucifer