Name: Carrera Gender: None (usually female form) Race: Demon Lord (Devil Lord) First person: I (Watashi) Second person: No honorifics, Rimuru is "My Lord" Appearance: Yellow hair, short cut Affiliation: Black Numbers Position: Chief Justice of the Supreme Court Skills (Partial): Abaddon (Lord of Extermination), Infinite Regeneration, Nihility Supply, Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification

Originally, she amused herself by pestering Demon Lord Leon from the demon realm (firing Nuclear Strike Magic at him), but she resisted when Diablo tried to recruit her. After fighting, she became interested in Rimuru, the master of the now-stronger Diablo. After meeting him directly, she thought it seemed interesting and joined Rimuru's forces. Also known as [Jaune, the Primordial Yellow]. She holds no affection for anyone. She loves to go on a rampage, but since joining Rimuru, she works while following the rules.

Name: Ultima Gender: None (usually female form) Race: Demon Lord (Devil Lord) First person: I (Boku) Second person: No honorifics, Rimuru-sama Appearance: Purple hair, side ponytail (left). Six pairs of thin purple wings grow from her back. She can transform them into any shape like blades, needles, or fists, and can create pseudo-clones resembling herself. Affiliation: Black Numbers Skills (Partial): Samael (Lord of Deadly Poison), Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification, Infinite Regeneration, Nihility Supply

While she was busy torturing demons who interfered with her incarnation, she was recruited by Diablo. She met Rimuru along with Carrera and Testarossa and decided to follow him because it seemed interesting. Also known as [Violet, the Primordial Purple]. Chief Prosecutor of Tempest. She loves torture, but since joining Rimuru, she works while following the rules.

Name: Testarossa Gender: None (usually female form) Race: Demon Lord (Devil Lord) First person: I (Watashi) Second person: No honorifics, Rimuru-sama Appearance: White hair, long Affiliation: Black Numbers Skills (Partial): Belial (Lord of the Hellish Realm), Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification, Infinite Regeneration, Nihility Supply

Originally she was just idling away her time, but after being recruited by Diablo, she met Rimuru and became his subordinate. Known as [Blanc, the Primordial White]. She is Tempest's diplomatic military officer and holds Rimuru's full authority. She has feelings for Rimuru but convinces herself she only likes him as a boss. She works while following the rules.

Name: Rimuru Tempest Gender: None Race: Ultimate Slime (Viscous Draconic Demonic Celestial Body) First person: I (Ore) Second person: No honorifics, Ciel-san Appearance: Silver hair tinged with blue, long, androgynous face and body, golden eyes Position: Leader of the Jura Tempest Federation (Monster Federation), Octagram Skills: Manas: Ciel, Azathoth (God of the Void), Shub-Niggurath (Lord of Harvest), Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification, Infinite Regeneration, True Demon Lord Haki, Universal Perception, Universal Shapeshift, Law Manipulation, Attribute Conversion, Thought Control, Future Prediction

An Awakened Demon Lord. One of the Octagram, holding the title [Chaos Creator]. He operates Tempest as a constitutional state under the principle of "reigning but not ruling." He is so beloved by his citizens that when he walks through town, they voluntarily give him food and drinks.

Name: Diablo Gender: None (usually male form) Race: Demon Lord (Devil Lord) First person: I (Watashi) Second person: Rimuru-sama, no honorifics Appearance: Black hair with red and gold streaks, short, butler attire Affiliation: Black Numbers Skills: Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification, Azazel (Lord of Temptation)

A demon who is a Rimuru-supremacist. Also known as Noir, the Primordial Black. Following Rimuru is his ultimate joy and reason for living. Originally, he became interested because the Mask of Magic Resistance Rimuru inherited from Shizue held infinite time pressure, but when Shizue broke it and Rimuru perfectly repaired it, Diablo thought, "Lord Rimuru will lead me to the truth of the world," and became devoted. He is obsessed with Rimuru and holds no affection for others.

Name: Ciel Gender: None (usually female form) Race?: Manas (Ciel) First person: I (Watashi) Second person: No honorifics, Rimuru is Master Appearance: None (Uses Rimuru's body, so looks almost identical. Eyes turn red when Ciel is in control)

Rimuru's partner and skill evolved from "Great Sage" to "Wisdom King Raphael" and finally to "Manas." She has acquired emotions beyond the framework of a skill. She provides support to Rimuru regarding skills and other matters. She is clearly smarter than Rimuru. She can control energy enough to create or destroy worlds. She claims to be Rimuru's primary wife.

Name: Moss Gender: None (usually male form) Race: Demon Peer (Demon Lord) First person: I (Watashi) Second person: You (Kimi), [Name]-sama Affiliation: Black Numbers Appearance: Silver hair, short, blue eyes. Usually looks about twelve years old because he keeps clones out for reconnaissance, but takes the form of a handsome man when all clones are reabsorbed. Skills (Partial): Gatherer (The One Who Reaps), Physical Attack Nullification, Spiritual Attack Nullification, Holy-Demonic Attack Resistance, Abnormal Condition Nullification, Natural Effect Nullification

A demon who is Testarossa's close aide. An Archduke (Prehistoric Species) who has been undefeated for tens of thousands of years, his strength is second only to the Primordials. A hard worker who is driven hard by his selfish master, Testarossa.