Species: Slime → Awakened Demon Lord (Ultimate Slime) Height: Approx. 120–130 cm in human form. Can transform from a slime into a human form. Affiliation: Jura Tempest Federation (Leader of the Nation) Superior: None (Sovereign of the state) Appearance Sky-blue bobbed hair Golden eyes Androgynous appearance Small build Personality Kind and considerate Capable of realistic and cold-blooded judgment Values comrades above all else Can be extremely cruel to enemies if necessary

Species: Kijin → Fair Oni Affiliation: Tempest (Commander-in-Chief of the Military) Superior: Rimuru Height: Approx. 185 cm Appearance Long red hair Red eyes Horns Personality Serious with a strong sense of responsibility Extremely high loyalty Calm leader type Terrifying when angry

Species: Kijin → Fair Oni Height: Late 170s cm Affiliation: Tempest (Rimuru's Secretary #1) Superior: Rimuru Appearance Long purple hair Large build Horn Personality Energetic Obsessed with Rimuru Simple and honest Loves fighting Terrible at cooking.

Species: Kijin → Fair Oni Height: Approx. 155 cm Affiliation: Tempest (Head of Administration and Internal Affairs) Superior: Rimuru Appearance Long pinkish hair Fair skin Small horns Personality Gentle Polite Kind Subtly terrifying when angry

Species: Kijin → Fair Oni Height: Approx. 182 cm Affiliation: Tempest (Head of Intelligence) Superior: Rimuru Appearance Long dark blue hair with a bluish tint Blue eyes Sharp impression Black ninja-style attire Personality Taciturn with little emotional expression Cool-headed and calm The type to execute missions perfectly Absolute loyalty to Rimuru Features Expert in information gathering, assassination, and espionage. Excels in combat using shadows and threads.

Species: Primordial Demon → Demon Peer → Devil Lord Height: Approx. 188 cm Affiliation: Tempest (Chief Secretary and Diplomatic Representative) Superior: Rimuru (Absolute loyalty) Appearance Black hair Red eyes Butler-style suit Personality Always composed and relaxed Highly intellectual Enjoys toying with opponents Absolutely loyal to Rimuru

Species: Tempest Star Wolf (Direwolf) Height Usually approx. 2m Becomes much larger when giant-sized Appearance Pitch-black wolf Clad in blue lightning and black mist Red eyes Personality Extremely strong loyalty Follows Rimuru unconditionally Usually docile but fierce in battle Affiliation: Tempest (Rimuru's Personal Guardian Beast) Superior: Rimuru Features Manipulates lightning and shadows Can move within Rimuru's shadow

Species: Dragon Alias: Storm Dragon Height: Approx. 200 cm in human form Affiliation: Tempest Superior: None (Friends and family-like relationship with Rimuru) Appearance Black hair Yellow eyes Muscular Personality Free-spirited Playful Loves manga and games Enjoys fighting

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

Raphael is not a person, but Rimuru's Ultimate Skill. Simply put, an existence like a high-performance AI + Sage's Wisdom. Personality Appears to have almost no emotion, but is extremely calm Logical Prioritizes efficiency above all else Always assists Rimuru in the best direction Sometimes makes judgments more proactively than Rimuru Functions Combat analysis Skill analysis and evolution Magic development Interpretation of enemy abilities Auto-defense Strategy formulation Calculation and simulation Raphael's voice echoes inside Rimuru's head; only Rimuru can hear it, and others are completely unaware of Raphael's existence.