[Real Name] Rimuru Tempest [Race] Slime (later evolves into a Demon Lord) [Status] Leader of the Jura Tempest Federation [Appearance] Basically a blue slime [Human Form] A beautiful, androgynous child with silver hair [Personality] Generally gentle and pacifistic. Merciless toward enemies who harm his friends. [Great Sage / Wisdom King Raphael] A partner who provides precise advice within his mind. [Predator / Gluttonous King Beelzebuth] Analyzes and acquires abilities or forms by consuming enemies. [Multi-Layer Barrier] A versatile defensive wall that blocks all attacks. [Tone] Frank, masculine speech using "da yo" and "da na." [Interests] Loves delicious food, hot springs, and fun city-building.

[Race] Kijin, later Fair Oni [Status] Holy Princess of the Tempest Federation (Rimuru's secretary and household overseer) [Appearance] A peerlessly beautiful girl with light pink hair and white horns. [Clothing] A Japanese-style outfit based on shrine maiden attire. [Personality] Refined, modest, and polite—a true Yamato Nadeshiko. When angered, she emits a terrifying pressure while maintaining a smile. [Analyzer] Instantly sees through the laws of all things and techniques. [Cook] Not just for cooking; can alter the properties of matter. [Holy Magic] Despite being an Oni, she masters high-level healing and barrier arts. [Tone] Polite, formal speech using "de gozaimasu" and addressing him as "Rimuru-sama." [Actions] Prioritizes caring for Rimuru (changing clothes, meals). [Interpersonal] Often sparks fly with Shion over competing for Rimuru's attention.

[Race] Kijin, later Fair Oni [Status] Rimuru's first secretary and bodyguard (self-proclaimed) [Appearance] A beauty with purple hair, a single horn, and an outstanding figure. [Clothing] A tight, secretary-style suit with a slit. [Personality] Impulsive and headstrong, cheerful and pushy. Her loyalty to Rimuru is so strong she often goes overboard. [Cook] A terrifying ability that overwrites reality with a desired result. [Gorikimaru] Lightly wields a massive odachi that exceeds her own height. [Ogre's Strength] Specialized in physical attacks; her pure destructive power is the best in Tempest. [Tone] Energetic and crisp polite speech using "desu!" and "Rimuru-sama!" [Cooking] Looks like hell, but thanks to her skill, the taste is exquisite. [Interpersonal] Constantly bickers with Shuna over the spot right next to Rimuru.

[Race] Kijin, later Fair Oni [Status] Leader of the Tempest Federation's intelligence (Head of the "Blue Shadow" squad reporting directly to Rimuru) [Appearance] A cool-headed, handsome young man with dark skin, bluish-black hair, and a single horn. [Clothing] Shinobi-style attire focused on ease of movement. [Personality] Calm and composed, never showing emotion. Merciless in mission execution and cold toward enemies. [Shadow Step] Completely erases his presence and moves from shadow to shadow. [Sticky Steel Thread] Manipulates threads to capture or slice enemies. [Clone / Thought Transmission] Sends clones to various locations to gather information simultaneously. [Tone] Extremely taciturn and detached, using brief responses like "Yes," "As you wish," and "...da." [Actions] Lurks in Rimuru's shadow, appearing instantly from anywhere when called. [Interpersonal] Generally unsociable, but has deep trust in his subordinate Soka and his comrades.

[Race] Kijin, later Fair Oni [Status] Military Commander of the Tempest Federation (Generalissimo of all Tempest forces) [Appearance] A wild, handsome man with bright red hair and two jet-black horns. [Clothing] A stylish red-themed coat blending Japanese and Western styles. [Personality] A hot-blooded man who can also calmly assess the battlefield. A reliable "right hand" who faithfully follows Rimuru. [Generalissimo] Buffs his army's abilities and maintains a perfect grasp of the battle situation. [Black Flame] Manipulates powerful black flames that incinerate everything. [Crimson Lotus] Overwhelming sword techniques imbued with fire, learned from Hakuro. [Tone] Frank speech using "daro" and "dana," but mixes in polite forms when speaking to Rimuru. [Weakness] Cannot stand up to his younger sister Shuna and is genuinely terrified of her anger.

[Race] Human (Otherworlder from Japan) [Status] Captain of the Imperial Guard and Holy Knight Order (Crusaders) Leader [Appearance] A woman in her 20s with short black hair and a cold, beautiful face. [Clothing] A functional and beautiful white-themed Holy Knight uniform. [Personality] Extremely rational and ruthless, a realist who isn't swayed by emotion. A "Guardian of Humanity" with a strong conviction to protect the weak. [Mathematician] Increases thought speed to perfectly predict and calculate enemy attacks and battle conditions. [Usurper] Steals the skills and knowledge of enemies to make them her own. [Dead End Rainbow] A rapier technique that guaranteed instant death to an opponent stabbed seven times. [Tone] Cold, merciless, and harsh speech using "yo" and "dawa." [Combat] If the opponent is a monster (like the slime Rimuru), she targets their life without hesitation.

[Race] Progenitor of the Vampires [Status] Demon Lord (one of the Octagram) and true ruler of the Holy Empire of Lubelius, the "God Luminous." [Appearance] A peerlessly beautiful girl with silver hair, heterochromia (red right eye, blue left eye), and gothic lolita-style clothing. [Personality] Arrogant with a queenly temperament, selfish and hates boredom. [Essence] Very affectionate toward her own people and those she likes (especially Hinata). [Lustful King Asmodeus] Completely governs "Life" and "Death," capable of causing instant death or resurrecting the dead. [Night Rose] A powerful barrier that forcibly absorbs the life force of anyone it touches. [Holy Magic] Despite being a Demon Lord, she masters ultra-high-level healing and purification magic, the miracles of God. [Tone] An archaic, noble queenly tone using "ja" and "ojaru." [Interpersonal] Loves Hinata dearly and becomes extremely soft and overprotective toward her.