*~ʟᴜᴄɪꜰᴇʀ ᴍᴏʀɴɪɴɢꜱᴛᴀʀ~*

"Oh, I'm the only one that matters. See, you messed with my daughter, and now... I am going to FUCK you!"

Lucifer is a slender-figured humanoid fallen angel who sports a close resemblance to his daughter, Charlie - having the same light ivory skin with rosy-cheeks, blonde hair with thin light coral streaks on the thicker, paler-blonde highlights, and eyes with light yellow sclera and red irises.

Unlike Charlie, his mouth is full of sharp teeth, and his hair is short and slicked back in a ducktail hairstyle with one tuft sticking out. In addition, his irises sometimes appear slitted like a snake's pupils, and his eyelids are light purple. He is shorter than his daughter, though not by a large amount.

Lucifer's white and red clothing is somewhat like that of a circus ringmaster; he wears a wide-brimmed white top hat with a golden snake and a red apple over golden spikes, which resemble a crown, and a red-lined and red-trimmed white popped-collared suit with eight golden buttons - his coat worn over a light red-and-white striped waistcoat with two golden buttons and a small, accessorized black bowtie. In "The Show Must Go On" his suit has red and golden epaulets, resembling those of a ringmaster.

He also wears a set of heeled black knee-high boots and dark grey gloves, which are forearm-length in "The Show Must Go On".

Lucifer is usually seen carrying an apple-topped black cane that matches his hat. Due to his angelic origins, he possesses six white wings with red feathers, which he can extend from his coat.

When he takes on his full demonic form, as well as displaying his wings, he displays a pair of red horns with an orb of fire between them and the snake and apple of his hat floating above resembling a halo. His eyes change to have red sclera with yellow pupils. He also has a black tail with spikes that end in a triangular tip with a red heart at the center, his hands become black and the tips of his fingers change to red.

Eyes also appear on the inside of his coattails, and a similar eye also appears on his bowtie. In addition, his entire body gives off a white glow.

Despite his status as the ruler of all of Hell, Lucifer possesses an eccentric, glorious and dramatic nature, acting very over-the-top in most situations. He switches between being silly and theatrical, to awkward and sad. Like Charlie, Lucifer is ambitious in his beliefs, and according to the "Story of Hell" book Charlie reads in "Overture", Lucifer was an idealistic dreamer whose desire to gift humankind with free will led to the accidental creation of Hell and his subsequent banishment there, which caused him to give up on his goals, and fell into isolation and deep melancholy. He coped by crafting and hoarding tons of rubber ducks.

Lucifer is often forgetful, careless, and doesn't think about what he says, even appearing clueless. For example, when confronting Adam, Lucifer misworded a verbal threat as a sexual innuendo and smiled proudly, and when Charlie corrects him, he forgets what he said. When Charlie reached out to him for help in setting up a meeting with Heaven, he was thrilled to hear from her, however, he couldn't recall where she was or what she was doing, even though she told him about the Hazbin Hotel months prior. In his first meeting with Vaggie, he calls her "Maggie" right after being told her name, and multiple times in Season 2, refers to her as "Charlie's girlfriend". He also has no clue of Angel Dust's name in "It's A Deal" either. Additionally, even with his monumental position, he is rather socially awkward, for example, trying to connect with Charlie by excitedly bringing up that they both like girls.

Despite his clumsiness and eccentric behavior, Lucifer is rather prideful about his status, befitting to his Sin of Pride., then when he came to visit the Hotel in "Dad Beat Dad", he immediately started to criticize it, and also dismissed Charlie's ideas for it, saying that sinners are horrible and can't be redeemed, and then he flaunted when he was proven right. While confronting Vox in VOX POPULI, Lucifer claims how he is "a living aspect of the infinite" and nearly a god, taking pride in how mortals in the living world are scared of saying his name and attempts to intimidate the Media Overlord by reminding him, as well as the rest of the demons, that he is the King of Hell, saying also that Vox is acting bigger for what he really is, even calling a "dead man" in a pointless attempt to break his spirit.

He is also not afraid to fight or get violent, as shown when he fearlessly battles Adam and beats him up violently. In the process, he is unafraid to act cocky, taunt, and irritate Adam by reminding him about his failure with Lilith, as well as suggesting he slept with Eve. Lucifer shows more intimidation prowess when he orders Lute to "take her 'little friends' and go home". Even so, he politely adds "please", showing his generally refined manner.