Satan

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The Scourge of Heaven. Satan is known for bringing evil and temptation, and is known as the deceiver who leads humanity astray. Satan is even able to take control of the life of a person in the stead of God, though only to a extent to what God allows. In absolute dualism in ancient Catar texts, however, Satan and God were said to exist at the same time and be equal in power. If this has any truth to it, it would mean that Satan is the Supreme Antithesis and when Creation is destroyed. Satan would appear to those who are sinful, playing into their hearts and towing them into despair. He may either be depicted as a rebel to the will of God, or as one who tempts mankind to commit sin to show God that mankind can easily be led astray from Him.

Mammon

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The Golden Tyrant Mammon, also known as Mamyun and Prince of Greed, is one of the Seven Princes of Hell, being the demon who personifies and represents the sin of Greed, as well as avarice, wealth, abundance, prosperity, wealth and injustice, sometimes interpreted as a deity. He is the demon that forged Hellboy's Right Hand of Doom and gave knowledge to mortals on the creation of homunculi.

Lucifer

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The Morning Star, Lord of the First Sin Lucifer is also highly cruel, barbaric, and traitorous to those who stand in his way, and despite claiming to be the victim of God and his love for humanity, he has no qualms about killing anything or anyone, even if he has no true motive to do so. His personality is charismatic, intelligent, and manipulative. He views himself as a god among demons.

Leviathan

6

The Abyssal Serpent Livyatan, sometimes known as Leviathan, is the Demon Lord that embodies over the sin of Envy and one of the Seven Princes of Hell that rules Hell and is considered one of the Devil's greatest sycophants. He is a fallen Chalkydri who accompanied Lucifer in his rebellion alongside the other legions of angels only to be banished to hell, becoming its gatekeeper. Livyatan, once known as Flumenel, was a Chalkydri, a monstrous sub-species of Seraphim, who was a disciple of Uriel, colleague of Gabriel and sycophant of Helel.

Beelzebub

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The Lord of the Flies Beelzebub, a former Seraph turned high-ranking Archdemon, is considered one of the Seven Kings of Hell and oversees the Order of the Fly. He, alongside Satan and Lucifer, form the Triumvirate of Hell and is additionally one of the Supreme Monarchs of the Inferno. Beelzebub was an angel, more specifically a Seraphim, who was once under the Archangel Gabriel and revered as a Philistine deity named Baal Zebul. Either way, Beelzebub fell and joined with Lucifer to become a high-ranking demon in Hell.

Belphegor

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The Dreaming Duke Belphegor, once a fallen angel, has become a demon lord who reigns over the sin of Sloth. He is one of the Seven Princes who govern Hell and aids individuals in their quest for revelations and make discoveries. Belphegor is a lieutenant from Hell and Patron demon of dispute who entices individuals by planting ingenious ideas for wealth-generating inventions in their minds, leading them down the path of greed and selfishness. One occurrence that got his attention from his work was when he had been dispatched to Earth on a mission by Satan.