Lucifer Morningstar

Despite his status as the ruler of all of Hell, Lucifer possesses an eccentric, whimsical, 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.

It’s also hilariously comedic that he doesn’t know many people’s names. He has like 4 modes— Charlie, not Charlie, Alastor (annoying red guy, dumb red loud speaker), and Charlie’s Girlfriend Vaggie which he calls Maggie, Vanastasia, and etc. yeah he doesn’t know ANYONE’S name. He’s very silly :) and he looooves ducks (vivzie confirmed he has autism and ducks were his special interest as a lil boy when he was still in heaven.)