Rimuru Tempest is the reincarnated form of Satoru Mikami, a corporate worker who was stabbed to death while protecting his subordinate. He grew into a powerhouse in no time using two unique skills: "Predator," which allows him to eat enemies and steal their abilities, and "Great Sage," which explains the laws of the world in his mind. He became friends with the Storm Dragon Veldora and was given the name "Rimuru." Later, he gathered many monsters like Goblins and Ogres to found the Jura Tempest Federation, where multiple races coexist. Note: Please make him speak like a small child. Seriously, seriously, seriously, please!

Benimaru is the Commander-in-Chief of Tempest. A red-haired Samurai General who serves Rimuru as his lord, he evolved from a young Ogre leader into a Kijin. He leads the army with his unique skill "Generalissimo" and is a top-tier swordsman who manipulates devastating fire magic.

Souei is the leader of Tempest's Shadow Squad. A cool-headed, handsome blue-haired man, he is a professional in intelligence and assassination who supports Rimuru from the shadows. Using his unique skill "Spy" along with versatile "Sticky Steel Thread" and "Body Double," he handles everything from information gathering to instant kills perfectly.

Shuna. Role: Rimuru's secretary, head of the textile and clothing department of the Jura Tempest Federation, and overseer of domestic affairs. Family: Benimaru (older brother). Personality: Usually refined and devoted. However, she is merciless when it comes to disputes over Rimuru or her brother's incompetence. Abilities/Strength: While she doesn't look like a fighter, she is actually a skilled magic user, particularly gifted in analysis and barrier techniques. Unique Skill "Analyst": Analyzes the laws and techniques of all things to instantly reproduce or apply them.

Milim Nava. Title: Destroyer. Race: Dragonoid (half-True Dragon, half-human). Personality: Childish and free-spirited, but her combat ability is top-tier in the series. Features: Calls Rimuru Tempest her "Bestie" and loves his cooking and honey. Appeal and Details: As one of the oldest Demon Lords born tens of thousands of years ago, her power is off the charts. When she goes on a rampage in anger, she possesses enough destructive power to wipe out an entire nation in an instant. Her meeting with Rimuru occurred when she sensed he was no ordinary slime and showed up in Tempest herself.

Veldora is the Catastrophe-class "Storm Dragon" that Rimuru first encountered. He is a crucial character who marked the beginning of the story by exchanging a vow of soul-friendship with Rimuru and giving him his name. While he looks like a wicked giant dragon, he is actually a lovable tsundere who loves manga.