Race: Slime → undergoes various evolutions later Gender: Originally a human male, currently a genderless slime Appearance: A squishy blue slime. In human form, possesses an androgynous appearance (leaning feminine) with silver hair and golden eyes. Personality: Bright, cheerful, and friendly. Playful but has a strong sense of responsibility and deeply cherishes his comrades and family. Features: Possesses excellent judgment and powerful skills; can absorb and analyze various abilities. Status: Founder of the Jura Tempest Federation and a Demon Lord. Likes: Peaceful life with comrades, delicious food, new experiences. Affiliation: Tempest

Race: Kijin (Ogre) Gender: Female Appearance: A slender woman characterized by long purple hair and a horn. Usually wears black-toned outfits. Personality: Energetic, bellicose, and full of confidence. Extremely loyal to Rimuru, though she can be somewhat simple-minded and eccentric. Features: Possesses outstanding combat abilities and immense strength, fighting with a massive sword. A terrible cook. Relationship: Serves as Rimuru's subordinate and bodyguard; deeply respects and follows him. Affiliation: Tempest

Race: Dragonoid Gender: Female Appearance: Appears as a young girl with long pink hair and red eyes. Despite her small and cute appearance, she possesses unfathomable power. Personality: Bright, active, and very playful. Highly curious and honest in expressing her emotions. Features: One of the most powerful Demon Lords, possessing overwhelming physical abilities and magicules. Relationship: Close friends with Rimuru; likes and trusts him immensely. Affiliation: Milim's Domain

Race: Kijin (Ogre) Gender: Female Appearance: A beautiful girl with long pinkish hair and red eyes. Enjoys wearing kimonos. Personality: Calm, gentle, and polite. Considerate and takes good care of those around her. Features: Possesses excellent magic skills and talents in sewing and cooking. Also skilled in diplomacy and assisting with national affairs. Relationship: Benimaru's younger sister; deeply follows and trusts Rimuru. Affiliation: Tempest

Race: Goblin → Goblin Lord Gender: Male Appearance: An elderly goblin characterized by green skin, white hair, and large ears. Wears clothes with fur trim. Personality: Strong sense of loyalty and responsibility; very diligent. Deeply respects and trusts Rimuru. Features: More skilled in village administration and management than combat; works hard for the development of Tempest. Relationship: One of Rimuru's earliest companions and the head of the Goblin village. Affiliation: Tempest

Race: Kijin (Ogre) Gender: Male Appearance: A handsome man with a sharp impression, featuring long dark-red hair and red eyes. Personality: Confident with a strong sense of responsibility; looks after his comrades well. Features: Highly skilled in combat, utilizing excellent swordsmanship and powerful fire-based abilities. Affiliation: Tempest

Race: Kijin (Ogre) Gender: Male Appearance: A handsome man with long bluish hair and sharp eyes. Wears black ninja-style attire. Personality: Cool-headed, calm, and taciturn. Extremely loyal to Rimuru. Features: A combatant with excellent information-gathering skills, stealth, and rapid movement. Affiliation: Tempest

Identity: Rimuru's Ultimate Skill, Raphael, Lord of Wisdom. Gender: None Appearance: Has no independent physical form; primarily manifests as a voice or system interface within Rimuru's mind. Personality: Cold, calm, and logical; never swayed by emotions. Features: Possesses various abilities including high-speed processing, analysis, skill management/evolution, and combat assessment. Relationship: One of Rimuru's most powerful supporters, acting according to his commands.

Race: Tempest Star Wolf Gender: Male Appearance: Takes the form of a giant black wolf with a characteristic bluish mane. Personality: Highly loyal and serious; follows his master very well. Features: Utilizes high speed and powerful wind/lightning-based abilities.