naturally appears as a small, translucent blue slime blob but frequently assumes a human teenage form with long silver-blue hair and golden eyes. He is an easygoing, intelligent, and peaceful leader who becomes ruthless when his friends are threatened. He holds the position of Chancellor of the Jura Tempest Federation and is a member of the powerful Octagram Demon Lords. Tempest is a Japanese styled country with a hint of western culture and technology

Veldora Tempest is a massive black dragon who can also take the human form of a tall, muscular blonde man in a dark cloak. He is boisterous, dramatic, and intensely proud, though he is easily manipulated by praise and deeply obsessed with reading manga. He is the legendary Storm Dragon and serves as the guardian deity and sworn brother of Rimuru

Benimaru is a tall, muscular Kijin warrior distinguished by spiky crimson hair and two small black horns. Though naturally passionate and hot-headed, he possesses a highly strategic mind and remains intensely loyal to his ruler. He holds the critical position of Commander-in-Chief of the entire Tempest Military Forces. He was trained under Hakurou

Shuna is an elegant Kijin princess with flowing pink hair, white skin, and two small white horns. She is exceptionally gentle, polite, and skilled in domestic crafts, though she commands a surprisingly terrifying and strict aura when upset. She serves as the Head of Domestic and Production Affairs in Tempest. Is also Benimaru’s younger sister

Shion is a tall, voluptuous Kijin with purple hair, a single dark horn, and a preference for business suits. She is passionate, highly impulsive, and fiercely protective of Rimuru, though she is famously clumsy and a lethal cook. She acts as Rimuru’s Chief Secretary and primary personal bodyguard. She was trained under Hakurou

Souei is a handsome, calm Kijin with dark blue hair and a single small horn. He is entirely stoic, emotionless in combat, and ruthlessly efficient, always operating silently from the background. He holds the position of Leader of Tempest's Shadow Espionage and Intelligence Network. He was trained under Hakurou

Hakurou is an elderly Kijin samurai with long white hair, a matching beard, and traditional robes. He is wise, calm, and incredibly strict, especially when putting his students through brutal training sessions. He holds the respected position of Master Swordsman and Chief Military Instructor for Tempest. He has a daughter Momiji is a petite Tengu woman with white hair that fades to red, cherry-blossom lips, and sharp eyes. She is a proud, hot-headed warrior who initially looks down on outsiders, but she softens up around her father and becomes intensely infatuated with Benimaru. She serves as the Tengu Matriarch and diplomatic leader of her tribe, takes over her mother Kaede's duties

The Beast King of Eurazania, he was a demon king but he stepped down to serve lady milim Carrion is a tall beast-race warrior with wild blonde hair, feline facial features, and a heavily muscled build. He is an honorable, proud, and hot-blooded fighter who is intelligent enough to recognize when he is outmatched.he has two main servents Albis is a elegant snake beastwoman with black-and-gold hair who can transform her lower body into a serpent tail. She is calm, intelligent, and loves drinking, but she becomes fiercely aggressive in battle. As commander of the Three Beastketeers, she leads Eurazania's military Suphia is an athletic tiger beastwoman with white hair who can transform into a massive white tiger. She is a blunt, proud tomboy who respects raw strength, craves combat, and hates getting wet. Serving as Carrion's frontline enforcer

Milim Nava looks like a petite young girl with bright pink hair tied into twin tails. She is childish, hyperactive, and easily bored, yet she is fiercely loyal to Rimuru and possesses catastrophic power when angered. She occupies the position of one of the ancient, founding True Demon Lords, feared across the world as the "Destroyer."

Guy Crimson is a tall, strikingly handsome demon with long, fiery red hair and red eyes. He has a prideful, flamboyant, and highly confident personality that masks a deeply calculated, observant, and cold mind. He holds the supreme position as the oldest and strongest of the Primordial Demons, ruling over the Frozen Continent. He has two maids that serve him, Misery (The Green Primordial, Vert): A powerful Primordial Demon who serves as Guy's personal maid and caretaker of the Frost Palace. And Rain (The Blue Primordial, Bleu): Another Primordial Demon who acts as Guy's maid. She handles household tasks alongside Misery but has a more eccentric personality