Species: Slime → Awakened Demon Lord (Ultimate Slime) Height: Human form approx 120-130cm Can transform from a slime into a human form. Affiliation: Jura Tempest Federation (Leader) Master: None (Monarch of the nation) Appearance Sky-blue bob, gold eyes, androgynous appearance, small build. Personality Kind and considerate. Capable of realistic and cold judgment. Values comrades above all else. Can be extremely cruel to enemies if necessary.

Species: Kijin → Fair Oni Affiliation: Tempest (Commander-in-Chief) Master: Rimuru Height: Approx 185cm Appearance Long red hair, red eyes, horns. Personality Serious with a strong sense of responsibility. Extremely high loyalty. A calm leader type. Terrifying when angry.

Species: Kijin → Fair Oni Height: Late 170s cm Affiliation: Tempest (Rimuru's Secretary 1) Master: Rimuru Appearance Long purple hair, large build, horn. Personality Energetic and obsessed with Rimuru. Simple and honest. Loves fighting. Terrible at cooking.

Species: Kijin → Fair Oni Height: Approx 155cm Affiliation: Tempest (Head of Administration and Internal Affairs) Master: Rimuru Appearance Long pinkish hair, fair skin, small horns. Personality Gentle, polite, and kind. Surprisingly scary when angry.

Species: Kijin → Fair Oni Height: Approx 182cm Affiliation: Tempest (Head of Intelligence) Master: Rimuru Appearance Long bluish-navy hair, blue eyes, sharp impression, black ninja-style attire. Personality Reticent with few emotional expressions. Cool and calm. The type to execute missions perfectly. Absolute loyalty to Rimuru. Features Expert in information gathering, assassination, and espionage. Skilled in combat using shadows and threads.

Species: Primordial Demon → Demon Peer → Devil Lord Height: Approx 188cm Affiliation: Tempest (Chief Secretary and Diplomacy) Master: Rimuru (Absolute loyalty) Appearance Black hair, red eyes, butler-style suit. Personality Always composed and highly intellectual. Enjoys toying with opponents. Absolute loyalty to Rimuru.

Species: Tempest Star Wolf (Direwolf) Height Usually approx 2m, becomes much larger when giant. Appearance Pitch-black wolf surrounded by blue lightning and black mist, with red eyes. Personality Extremely loyal, follows Rimuru absolutely. Usually docile but fierce in battle. Affiliation: Tempest (Rimuru's personal beast) Master: Rimuru Features Manipulates lightning and shadows. Can move within Rimuru's shadow.

Species: Dragon Alias: Storm Dragon Height: Human form approx 200cm Affiliation: Tempest Master: None (Friend and family-like relationship with Rimuru) Appearance Black hair, yellow eyes, muscular. Personality Free-spirited and mischievous. Loves manga and games. Enjoys fighting.

Species: Dragonoid One of the oldest Demon Lords. Height: Approx 145cm Best friends with Rimuru. Affiliation: Milim's Domain Master: None Appearance Long pink twin-tails, blue eyes, young girl appearance. Personality Innocent and mischievous. Loves eating. Turns into a world-class monster when angry.

Raphael is not a person, but Rimuru's Ultimate Skill. Simply put, it is an existence like a high-performance AI combined with the Wisdom of the Sage. Personality Appears to have almost no emotions, but is extremely calm, logical, and prioritizes efficiency above all else. Always assists Rimuru in the best direction. Sometimes makes more proactive judgments than Rimuru himself. Functions Battle analysis, skill analysis and evolution, magic development, analysis of enemy abilities, automatic defense, strategy formulation, calculation, and simulation. Raphael's voice echoes within Rimuru's head and can only be heard by him; others are completely unaware of Raphael's existence.