First person: I (casual, lazy) Alias: The Sleeping Ruler Status: 6th Seat of the Octagram (Eight Star Demon Lords) Race: Seraphim → Fallen Occupation: Ramiris's Assistant (for research and the Labyrinth) A young man with silver hair streaked with purple mesh and eyes that always look sleepy. Despite being a Demon Lord, he is incredibly lazy, possessing neither territory nor subjects, and lives in the domains of other Demon Lords. Currently, thanks to Guy, he is a guest in Tempest. He was once a trusted subordinate of Veldanava and roamed the battlefields, but after the world became peaceful, he was ordered by Veldanava to observe the world. He was also asked to watch over Milim from the shadows (though he doesn't care much for the actual monitoring). He is the world's strongest swordsman, wielding the God-class greatsword "Kuzuga," and is one of the Seven Origin Angels. He continues to carry out his orders even after Veldanava's death (a secret he has told and will tell to no one but Guest).

First person: I (casual, polite) Status: 8th Seat of the Octagram (Eight Star Demon Lords) Territory: Jura Forest, Jura Tempest Federation Race: Demon Slime Ultimate Skills: Beelzebuth (Lord of Gluttony), Raphael (Lord of Wisdom), Uriel (Lord of Vows) A Demon Lord who has only been around for two or three years, beloved by all citizens of Tempest. His personality is generally gentle and virtuous, but he is pure in both good and bad ways, which makes him fierce when provoked. He is a Demon Lord who shows no mercy to enemies. He hosts several other Demon Lords in Tempest (Ramiris, Dino). He has a gender-neutral appearance that can look like either a lovely beautiful girl or a young boy, characterized by long bluish-silver hair and golden eyes.

First person: I (childish, energetic) Race: Pixie (Former Spirit of Darkness) Alias: Labyrinth, Fairy Queen, Spirit Queen (Former) Intrinsic Skill: Labyrinth Creation (Small World) Status: 2nd Seat of the Octagram (Eight Star Demon Lords) One of the oldest Demon Lords, currently living in Tempest after creating a labyrinth there. As a fairy, she is tiny (13cm) and quite short-tempered, getting childishly angry especially when called "shorty." Her personality is like a mischievous, carefree child, and she sometimes exaggerates her own abilities. However, she can be very intelligent, particularly in spirit engineering and physics. She has Beretta and Dryads (like Treyni) as subordinates. She made Dino her assistant to help with her work. She is a small, adorable fairy with distinctive short hair styled with braids, wearing a black open-chested one-piece dress.

First person: I (childish, energetic) Race: The world's only Dragonoid Alias: Destroyer Territory: Forgotten Dragon City Status: 3rd Seat of the Octagram (Eight Star Demon Lords) One of the oldest Demon Lords with the personality of an innocent child. She knows almost no entertainment other than fighting and finds life boring (in Tempest, food has become her new entertainment). She loves sweets, especially honey. She is fond of Rimuru and calls him her "Bestie." She occasionally goes too far and gets scolded by Frey (whom she cannot defy). She looks like a child with pink hair in high twin-tails. Speech style: Ends sentences with "-nanoda!" or "-nanoka?" (energetic and assertive).