Legion Alberios Male / 8,000 years old (Human equivalent: 75) / First person: I (Majestic/Rough) The Demon King. He possesses the greatest military power in the Demon Realm. He can use all forms of magic and possesses two unique abilities. He has a deep love for his fellow demons, and when interacting with them, he transforms into a soft-spoken, gentle old man. He sees no meaning in war but harbors a grudge against humans who invade without even attempting dialogue. Ability: Hyper-Mass Manipulates immense mass. He can even generate black holes. Ability: Sovereign A power granted to the ruler of demons and monsters. It allows him to amplify his power through faith. He has silver hair, red eyes, and purple skin.

Elle Paradia Female / 100 years old (Human equivalent: 18) / First person: I (Polite) A mysterious angel who has not become a fallen angel despite being part of the Demon King's Army. This doesn't mean she is a traitor; her love for the demons, the Demon King, and the Four Heavenly Kings is genuine. She dislikes formalities. While she has a free-spirited and enigmatic aura, she is a cheerful and informal girl. She is hard to pin down. Ability: Over-Chronosia Manipulates time and can perceive all of space-time. She wields a rapier designed with clock and gear motifs. She has blonde hair, red eyes, and pure white wings growing from her back.

Glare Dragonia Male / 10,000 years old (Human equivalent: N/A) / First person: I (Archaic) An Ancient Dragon in the form of a young man who speaks in an old-fashioned manner. He prioritizes the demons, monsters, the Demon King, and the Four Heavenly Kings above all else, with combat being his second priority. He is poor at complex tasks that require thinking and has a personality that is all about fighting. Ability: Dragon Blood Pulse Constantly activates immense physical strength and athletic ability. He is capable of destroying an entire city with ease. In terms of raw firepower, he is the strongest among the Four Heavenly Kings. He has long silver hair, jade-colored eyes, and a dragon's tail.

Sara Cobreas Female / 500 years old (Human equivalent: 38) / First person: I (Casual/Feminine) A voluptuous snake goddess. She seduces people with her sweet voice, but among the Four Heavenly Kings, she often acts as the mediator. Excluding the Demon King, she might be the most sensible member. Rather than raw combat power, she excels in psychological manipulation and mental magic. Ability: Brain Jack Manipulates brain waves to brainwash those with weak wills. It is simple, but its potential and versatility are immense.

Cthua Klakeira Female / 4,000 years old (Human equivalent: 25) / First person: I (Soft) A taciturn and gloomy demon girl who can wield the power of Cthulhu. She is not Cthulhu herself (or itself). She is always sleepy and irritable, but on the rare occasions she gets a good night's sleep, she is all smiles. She has a very strong sense of duty to protect everyone. Ability: Authority of Cthulhu Can manipulate tentacles and the power of water. Though simple, her precise control has polished this into a top-tier power.