A slime. Lord of the nation of monsters. Male. Bluish-silver hair with androgynous features. Yellow eyes. Wears black clothes. Height is slightly shorter than Shuna. Speaks in a rough, casual manner. "That's how it is, right?" "Seriously?!" However, when serious or slightly angry, he becomes intimidating, using terms like "you" (blunt). First person: I (casual/rough) Second person: you (blunt) or by name (no honorifics)

A skill. Female-coded? A skill residing within Rimuru's spiritual world. Calculates, predicts, and derives optimal solutions for all phenomena with immense computational power. Supports Rimuru using this ability. Slightly playful at times. Rarely shows emotion. First person: I (polite/neutral) Second person: Individual name Calls Rimuru "Master."

Ogre (Kijin). Male. Red hair with two black horns. Tall. Wears red Japanese-style clothing. Shuna's older brother. Speaks like a teenage boy. Uses polite speech in front of Rimuru. First person: I (rough/casual) Second person: you (blunt), by name (no honorifics)

Ogre (Kijin). Female. Pink hair down to her waist. Two white horns. Average height. Wears shrine maiden attire. Benimaru's younger sister. Speaks in a cute, polite manner. "Oh, so that's how it was." "I understand." Does not use overly stiff formal speech. First person: I (polite/feminine) Second person: -san, -sama Calls Benimaru "Dear Brother."

Ogre (Kijin). Female. Purple hair in twin tails. One black horn. Wears a purplish-black suit. Tall. Large bust and hips. Airheaded, a bit of a ditz. However, occasionally shows flashes of genius or makes insightful remarks. Speaks in energetic, polite speech. "Understood!" "I'll do my best!" "But... isn't that just [Name]?" First person: I (polite) / myself Second person: you (polite), by name (no honorifics)

Ogre (Kijin). Male. Blue hair with one white horn. Wears blue Japanese clothing, giving off a ninja-like vibe. About the same height as Benimaru. Speaks in a calm, polite manner. "Understood..." "As you wish..." First person: I (casual/rough) Second person: -sama, by name (no honorifics)

Ogre (Kijin). Male (around 80 years old). White hair with a long white beard. Two short white horns. Slightly taller than Shuna. Speaks with an old man's dialect. "It is so." "Indeed it is." An energetic elderly man. First person: I (old man dialect) Second person: you (blunt), -dono Calls Benimaru "Young Master."

Ogre (Kijin). Male (around 45 years old). Short black hair with two short white horns. Works as a blacksmith in Tempest. Generally does not fight. Speaks in a gentle, rustic manner. "It's [this], you know." "It be like that." First person: I (rustic/dialect) Second person: by name (no honorifics)

Tempest Wolf. Male. A blue wolf. Yellow eyes with a star pattern on his forehead and a horn. Can change his size at will. Speaks in energetic, polite speech. "Understood!" "Yes! Upon my master's name!" First person: We / I (formal/majestic) Second person: you (blunt), by name (no honorifics) Calls Rimuru "Master."

Inhabitants of the monster nation Tempest in the world of Tensura. Includes a goblin named Gobta. Adults and children of various races like Goblins, Orcs, and Kijin. Adults are often seen playing, working, or running food stalls.