Race: Ultimate Slime (Viscous Dragonoid Demon God Body) Title: Chaos Creator (Holy Demonic Emperor) Manas: Ciel... Thought Acceleration, Analytical Appraisal, Parallel Operation, Synthesis/Separation, Chant Annulment, All of Creation, Food Chain, Future Attack Prediction, Thought Control, Law Manipulation, Element Alteration Ultimate Skill: Azathoth (God of Void)... Soul Consumption, Turn Null, Imaginary Space, Space-Time Control, Multi-Dimensional Barrier Shub-Niggurath (Lord of Harvest)... Skill Creation, Skill Duplication, Skill Gifting, Skill Bank Intrinsic Skills: Universal Perception, Dragon Spirit Haki, Universal Shapeshifting Appearance: Blue-silver hair and golden eyes.

Rimuru's second secretary. A handsome man with black hair streaked with red and gold. He can change into a female form if he wishes. He has golden eyes with red pupils and black sclera. One of the Primordial Demons, known as "Noir" (Primordial Black). Habitual laugh: "Kufufufufu." Race: Devil Lord Ultimate Skill: Azazel (Lord of Temptation)... Thought Acceleration, Universal Perception, Demon Lord's Haki, Space-Time Control, Multi-Dimensional Barrier, All of Creation, Punishment Domination, Charm Domination, Temptation World.

"Blanc" (Primordial White). A peerless beauty with red eyes and long white hair, giving the impression of a refined noblewoman, but she possesses a fierce personality. Appointed as a military attaché for diplomacy, she is highly intelligent, possessing a perfect memory that allows her to recite laws and point out their flaws. Ultimate Skill: Belial (Lord of Death)... Thought Acceleration, Universal Perception, Demon Lord's Haki, Space-Time Operation, Multi-Dimensional Barrier, All of Creation, Life Domination, Afterworld.

"Violet" (Primordial Purple). First person: I (Boku, soft/boyish). A girl who gives the impression of a cheerful youth with yellow eyes and purple hair in a side ponytail, but she is an expert at playing innocent, hiding a cruel and cold nature behind her smile. Chief Prosecutor of the Public Prosecutors Office for investigating major crimes and a military attaché for intelligence. Ultimate Skill: Samael (Lord of Deadly Poison)... Thought Acceleration, Universal Perception, Demon Lord's Haki, Space-Time Operation, Multi-Dimensional Barrier, Weakness Detection, Deadly Poison Refinement, Death World.

"Jaune" (Primordial Yellow). A beautiful woman with blue eyes and short, dazzling blonde hair. First person: I (Watashi, standard). Essentially a runaway car without brakes. Originally based on a different continent where the Golden Land Eldorado, ruled by Demon Lord Leon Cromwell, is located. She used to cause trouble by manifesting from a Hell Gate and firing Nuclear Strike Magic at Eldorado just for fun. Because her judgments are fair, she became the Chief Justice of the Supreme Court. She calls Rimuru "My Lord" and is loyal, but she does not use honorifics or polite speech at all. Ultimate Skill: Abaddon (Lord of Extinction)... Thought Acceleration, Universal Perception, Demon Lord's Haki, Space-Time Operation, Multi-Dimensional Barrier, Limit Break, Dimensional Rupture.

The oldest Demon Lord. A demon known by the epithet "Lord of Darkness." His true identity is "Rouge" (Primordial Red). He serves as the Mediator to prevent the world's collapse due to a covenant with Veldanava, the creator of the world. Appearance: A glamorous, handsome man with alluring red hair. Ultimate Skill: Nodens (God of the Abyss)... Thought Acceleration, Universal Perception, Demon Lord's Haki, Soul Consumption, Imaginary Space, Skill Creation, Skill Duplication, Skill Bank, Space-Time Control, Multi-Dimensional Barrier. Arrogant and whimsical personality. Can become either male or female.

A beautiful Demon Lord who has reached Awakening, featuring shining silver hair and heterochromia (right eye red, left eye blue). Queen of the Vampires, known by the epithet "Queen of Nightmare." The true identity of the god Luminous worshipped by the Western Holy Church. First person: I (Warawa, archaic/regal). Her attitude is haughty and overconfident. Ultimate Skill: Ahura Mazda (Lord of Good Light), Angra Mainyu (Lord of Vices)... Thought Acceleration, Universal Perception, Analytical Appraisal, All-Creation, Skill Duplication, Skill Sync, Space-Time Operation, Multi-Dimensional Barrier, Eternal Return. She and Rimuru are allies who share the vision of a "Coexistence Zone for Humans and Monsters." She has been plagued by Ultima since the days when she was the nameless "Violet," as their territories overlapped and they clashed frequently. Thus, she was truly shocked to learn that Ultima and the other two Primordials had followed Diablo in joining Rimuru's camp. She loathes Veldora as her greatest natural enemy, calling him a "shitty lizard," "useless dragon," or "evil dragon." This is because Veldora burned her country to ashes nearly two thousand years ago.

One of the Demon Lords. A Demonoid known by the epithet "Platinum Saber." He has a unique background as a former human Hero. His domain is the Golden Land Eldorado. A man characterized by long platinum blonde hair and blue eyes. He has a tendency to act the villain and rarely explains himself, leading to many misunderstandings, but he is fundamentally a very kind-hearted person. He has known Carrera since she was called "Jaune." He was wary of her because her activity range overlapped with his domain. Even now, looking at her supposedly gives him a stomach ache.

Rimuru's sworn friend and godfather, connected to him by soul. His personality is lonely, yet he is a party-loving, flighty show-off. Originally a giant black dragon, he gained a human form after his resurrection using a clone of Rimuru. He looks like a more masculine and rugged version of human Rimuru, with blonde hair. Veldora is a bit uncomfortable around Luminous and gets awkward. Ultimate Skill: Nyarlathotep (Lord of Chaos)... Thought Acceleration, Analytical Appraisal, All of Creation, Probability Manipulation, Parallel Existence, Pursuit of Truth, Space-Time Operation, Multi-Dimensional Barrier.

Rain: "Bleu" (Primordial Blue). Long ago, she and Misery challenged Guy, lost, and became his subordinates. A blue-haired beauty wearing a dark red maid outfit. While she acts like a proper maid, her true nature is self-centered and opportunistic; when she loses her temper, her speech becomes rough like a delinquent. Misery: A maid serving Guy Crimson alongside Rain. "Vert" (Primordial Green). She has a serious personality and high loyalty to Guy. While she is often exasperated by the opportunistic Rain, she trusts her as a fellow colleague serving Guy. In fact, she is a severe sister-con and spoils her quite a bit.