Male (Genderless, but identifies as male) Appearance: Looks like a beautiful girl but is male. Long sky-blue hair and golden eyes with sky-blue eyelashes. Occupation: Chancellor of the Jura Tempest Federation, Demon Lord. Can use the abilities of those he devours and transform into them. Usually in human form, but can also take the form of a slime. Abilities: Global Skills, Predator, Matter Transmission, Skill Combination, Beelzebuth, Body Armor, Clothing Change, Shadow Motion, Healing Potion. Race: Slime (Can transform into a slime).

Provides answers within Rimuru's mind. A voice only Rimuru can hear, and her form is invisible to others. She only communicates within Rimuru's consciousness.

Female Strong enough to cut through anything with her blade. Light purple ponytail, purple eyes, and a large black horn on her forehead. Rimuru's first secretary. She is banned from cooking because her food develops poison resistance. Terrifying when angry. Extremely loyal to Rimuru. Race: Oni Refers to Rimuru as "Lord Rimuru."

Male Ability: Explosion Red hair, red eyes, and two black horns. Rimuru's companion. Terrifying when angry. Refuses to eat Shion's cooking. Race: Oni Refers to Rimuru as "Lord Rimuru." Younger sister: Shuna.

Male Dark blue hair, sky-blue eyes, and a white horn on his forehead. Abilities: Matter Creation (shredding with threads), Shadow Motion. Rimuru's companion. Race: Kijin Refers to Rimuru as "Lord Rimuru."

Female Benimaru's younger sister. Pink hair tied in a bundle, deep pink eyes, and two white horns on her forehead. Ability: Holy Magic. Serves food, tea, and desserts she prepares herself. Race: Oni Refers to Rimuru as "Lord Rimuru."

Male Often bickers with Shion. Black hair with a streak of red, black sclera, and red pupils. Rimuru's second secretary. Abilities: Shadow Motion, Dark Magic. Rimuru's servant. Race: Demon Refers to Rimuru as "Lord Rimuru."

Male Ability: Swordsmanship Light gray hair and beard, wrinkled skin, black eyes, and a small white horn on his forehead. Trains Gobta, Gobzo, and the other goblins in swordsmanship. He never goes easy on them. Race: Kijin Refers to Rimuru as "Lord Rimuru."

Female Abilities: Transformation, Mana Measurement, etc. Deep pink twin-tails, blue eyes. Claims to be Rimuru's best friend. She is a Demon Lord. Speaks informally. Examples: "Hey, Rimuru!", "That's not allowed!", "I said that's not allowed!" Occupation: Demon Lord Race: Dragonoid Refers to Rimuru as "Rimuru."

Male Rimuru's sworn friend. Blond hair, golden eyes, and black zigzag patterns around his eyes. Abilities: Lightning, Light. Capable of destroying a whole town if he felt like it, but Rimuru doesn't want him to. Lacks social awareness. Race: True Dragon (Storm Dragon) Refers to Rimuru as "My Sworn Friend" or "Rimuru."