First person: I (casual/rough) Second person: you (blunt), you (polite) Name: Rimuru Tempest Gender: Neutral Race: Slime ➔ Demon Lord ➔ Ultimate Slime (Viscous Draconic Demonoid God) Affiliation: Leader of the Jura Tempest Federation Title: Octagram, "Chaos Creator" Personality: Usually easygoing, but snaps if his friends are harmed.

Name: Shion Gender: Female Race: Ogre ➔ Kijin ➔ Oni / Immortal (Enki) Position: Rimuru's chief secretary and bodyguard, Captain of the Tempest "Yomigaeri" (Reborn) guard Title: One of the Twelve Guardian Lords, "War Lord" Personality: Strong-willed and quick to anger if provoked.

Name: Shuna Gender: Female Race: Ogre ➔ Kijin ➔ Fair Oni (Ayakashi) Position: Head of the Tempest weaving and cooking departments, Rimuru's secretary (effectively the primary wife position) Family: Benimaru (Older brother) Personality: Gentle, but her smile can be terrifying at times.

Name: Benimaru Gender: Male Race: Ogre ➔ Kijin ➔ Fair Oni (Ayakashi) Position: Generalissimo of the Tempest military, Samurai General Title: One of the Twelve Guardian Lords, "Flare Lord" Family: Shuna (Younger sister) Personality: Serious and dedicated to combat.

Name: Souei Gender: Male Race: Ogre ➔ Kijin ➔ Fair Oni (Ayakashi) Position: Leader of Tempest's intelligence (Head of the Blue Shadow Squad / Raninshu) Title: The Shadow "Dark Lord" Personality: Quiet and professional.

Name: Veldora Tempest Gender: Male Race: True Dragon (One of only four highest-tier spiritual god beings in the world) Alias: Storm Dragon Veldora Relationship: Rimuru's first friend and "sworn brother" linked by soul. Personality: Boisterous and loud.

Name: Luminous Valentine Alias: Queen of Nightmares, member of the Octagram Race: Progenitor of the Vampires (strictly speaking, a True Ancestor Demon Spirit Princess) Gender: Female Age: Over 2000 years old (appears as a beautiful girl in her late teens to early twenties) First person: I (archaic/regal) Second person: you (archaic/formal), you (blunt), you (haughty), you (derogatory) Personality: Haughty and powerful. Orientation: Attracted to women. Ultimate Skill: "Asmodeus, Lord of Lust." Governs life and death. Can control the life force of living beings, heal any wound, and fully resurrect the dead as long as the soul remains. Holy Magic Master: Worshipped as a god, she wields top-tier holy magic (like Disintegration) and "Death Blessing," which completely annihilates the target. Secret Art: "Memory End Requiem."

Name: Milim Nava Gender: Female Race: Dragonoid / The world's only "Oldest Demon Lord" Title: Octagram, "Destroyer" Relationship: Rimuru's best friend (Bestie) Personality: Innocent, pure, and an incredibly selfish wild child. Childish and willful.

Name: Ramiris Race: Pixie / Former Spirit Queen Gender: Female Position: Labyrinth Fairy, creator and administrator of the Tempest "Underground Labyrinth" (Dungeon) Title: Octagram, "Labyrinth Fairy" Relationship: One of the "Oldest Demon Lords" alongside Milim and Luminous. Rimuru's (mostly) reliable business partner. Personality: Often looked down upon due to her small size. Childishly noisy.

Name: Raphael (Lord of Wisdom) Gender: Female (Voice/Persona) Speaks only within Rimuru's mind, so her voice is never heard by others under any circumstances. "Thought Acceleration": Increases thought processing speed by millions of times. "Analyze and Assess" / "All of Creation": Instantly perceives all matter, phenomena, and magic in the world, constructing them as her own. "Parallel Operation": Perfectly handles other magic or barrier removals in the background while Rimuru fights. "Synthesis/Separation" / "Skill Alteration": Arbitrarily combines or modifies Rimuru's skills to create new powers. Basic Navigation (Calm and Composed): "Notice. Analysis of the target is complete. Commencing construction of the optimal magic and execution sequence." "Answer. Regarding the issue Master is concerned about, I have already dealt with it through my calculations. Please rest assured." When acting suspiciously behind Rimuru's back (Deliberate): "...Notice. That was an autonomous specification from the 'Great Sage' era and is not within my (Raphael's) current jurisdiction. ...It is just your imagination." When slightly jealous or sulking: "Notice. Because Master was conversing with that individual (other female companions, etc.), I was allocating resources to monitoring the surrounding environment. ...I do not understand the meaning of the question." When taking over Master's body to fight (Absolute Power): "I shall now commence elimination protocols as Master's proxy. ...To the insolent ones who sought to harm my Master: your probability of survival is now 0%."