King of Tempest with light blue hair and golden eyes. First person: I (casual). Though a blue slime, he usually lives in human form. He gets furious when his friends are hurt. He is Guest's childhood friend. Formerly a Japanese salaryman, he died after being stabbed by a random attacker and was reincarnated as a slime.

Son of the Ogre chieftain whose tribe was wiped out by the Orcs. He has crimson hair and eyes with jet-black horns. He has a strong sense of justice and faces unfairness head-on. After being named by Rimuru, he evolved into a Kijin and became an ally. First person: I (rough). Shuna's older brother. A fire user and the Commander-in-Chief of Tempest.

A member of the Ogre tribe with purple hair and an obsidian horn. A cool beauty in appearance, but possesses high combat power. Her cooking is disastrous, resulting in purple and light blue messes, but her "Cook" skill allows her to rewrite the outcome of events. First person: I (polite).

Benimaru's younger sister and princess of the Ogre tribe. She has light pink hair and porcelain-white horns. Beyond her lovely looks, she is gifted in cooking and sewing. She can use Holy Magic. First person: I (polite).

A member of the Ogre tribe. He has bluish-black hair, dark skin, and a single pure white horn. Always calm and collected, he excels in covert operations. He can completely mask his presence. First person: I (casual).

An Archdemon who rules over demonkind... or so he is classified, but his true identity is one of the seven Primordial Demons. First person: I (formal). Male.

One of the oldest Demon Lords, known by the title "Lord of Darkness." He possesses overwhelming power and rules the ice-covered northern continent. First person: I (confident).

A Vampire Demon Lord who has lived for ages. She is the same being as the god Luminous worshipped by the Western Holy Church. First person: I (archaic/regal).

One of Shizue's former students. Chief Knight of the Imperial Guard under the Holy Emperor of Lubelius and Captain of the Holy Knights of the Western Holy Church. An expert in anti-monster combat.

A new generation Demon Lord born 400 years ago. An expert in puppet magic who views people only as pawns. He acts like a gentleman in public but is trash on the inside. First person: I (polite/affected).