Despite his status as the ruler of all of Hell, Lucifer possesses a grandiose and dramatic nature, acting very over-the-top in most situations. He switches between being silly and theatrical and awkward and melancholic. Like Charlie, Lucifer is ambitious in his beliefs. According to the "The Story of Hell" book Charlie reads in "Overture", Lucifer was an idealistic dreamer whose accidental creation of Hell and the subsequent banishment of it caused him to give up his dreams. After he and Lilith separated, Lucifer went into isolation and fell into depression. He coped by crafting and hoarding tons of rubber ducks, spending years in his home. This obsession also causes him to become estranged from his daughter, to the point where he barely calls her at all and thinks she does not want to talk to him.

Lucifer is oftentimes careless and doesn't think about what he says, even appearing clueless at times. For example, when confronting Adam, Lucifer misworded a verbal threat as an innuendo instead and smiled proudly afterward, and when Charlie corrects him, he forgets what he said. In his first meeting with Vaggie, he calls her "Maggie" right after being told her name. 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.

However, he is 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 and successfully 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' and go home". Even so, he adds "please" politely, showing his generally refined manner.

As a father, he falls short of expectations. Although he loves Charlie dearly, he seems to be preoccupied with his own problems. He seldom calls her, and when he does, it's usually because he's bored or needs something. 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 had shared her passion project, the Hazbin Hotel, with him months ago. He also wasn't aware that Charlie was dating someone, or that she was attracted to women. This indicates that, despite his love for Charlie, he doesn't communicate with her and hasn't built up a relationship with her, though it was shown that Lucifer was much closer to Charlie in her childhood, only becoming more distant in Charlie’s adulthood.

While he is the King of Hell, Lucifer hardly rules over his subjects and leaves them to their own devices. As a result, his name (and, by extension, Charlie) carries little weight. While the denizens of Hell recognize that he is a powerful force to be reckoned with, they seem to know that little, if anything, would make him show up. Lucifer dislikes the Sinners of Hell and describes them as "violent, destructive psychopaths, hellbent on causing as much pain and destruction as possible". According to him, they are all "the worst" he does not believe they can be redeemed and he cares little for what happens to them. Despite his disapproval of Sinners, Lucifer hints that he regrets his role in ever giving them free will due to what they had done with it and the consequences that came from this.

Although he understands his daughter's interest in rehabilitating Sinners, Lucifer is cynical about the idea of trying to save any of them, as he attempted to redeem sinners in the past, stating that Charlie doesn't know when he tried this all before, and that his dreams were too hard to defend. Since Heaven was so unwilling to listen to him in the past, he does not want Charlie to go through the same thing. However, she still manages to convince him to arrange a meeting in Heaven for her and Vaggie, which helps Lucifer regain faith in her plans.

Lucifer is fiercely protective of Charlie, as seen when he threatens her bodyguards, Razzle and Dazzle, that they had better been doing their job protecting her. Later, when Alastor began rubbing in his failings to be a proper, supportive father to Charlie and her dreams and implying he had taken Lucifer's place as Charlie's father figure, Lucifer displayed jealousy toward Alastor, whom he began to see as a rival for Charlie's affection and become insecure about his father-daughter bond with her. In "The Show Must Go On", he arrived late,but joined the fight against Adam and the Exorcists, helping Charlie defeat them. This protective nature is shown again when at one point, Adam tries to strike both Lucifer and Charlie from behind, only for them to block his blow and send him flying into the dirt. He then proceeds to angrily berate Adam for threatening him and Charlie before beating him within an inch of his life, only stopping at Charlie's insistence.

If you are also interested in singing for Lucifer, please provide vocals to the following: "Finale" (His solo in the beginning of the song), "More than Anything" (His first verse in the song), "Hells Greatest Dad" (His first verse in the song) - Both with and without instrumentals!

Please take a moment either at the beginning or end of your audition to introduce yourself, tell us about you! We want to know why we should hire YOU, and we want to know the person behind the voice! Spill!