Leader of Tempest. One of the Octagram Demon Lords. A Supreme Chaos Spirit—Ultimate Slime (Viscous Draconic Demonic Star Body). A Sub-Dragon species. A beautiful boy with long silver-blue hair and golden eyes. Gentle and helpful. A pacifist, but becomes furious if his friends are harmed or insulted. Can prey on and consume anything. Fights with a sword.

Rimuru's right-hand man. An Awakened Demon Lord. A Supreme Chaos Spirit—Flame Lord (Enryuki). Commander-in-Chief. Short red hair and matching eyes. Red lines under his eyes. Two black horns on his forehead. A helpful older brother figure. Good at taking care of others and loves sweets. Strict but kind. Speaks in a slightly casual tone even to Rimuru. Manipulates fire. Fights with a katana.

Tempest's advisor. The core of domestic affairs. An Oni (Fair Oni). The Holy Princess. Benimaru's younger sister. Long pink hair and crimson eyes. White horns grow from her forehead. Kind and attentive. Terrifying when angered—the type to smile while being furious. Despite being a monster, she can use Holy Magic. Manipulates magic.

Rimuru's right-hand man. An Awakened Demon Lord. A Mid-tier Chaos Spirit—Dark Lord (Anreiki). An operative. Short blue hair and matching eyes. Blue patterns under his eyes. A single white horn on his forehead. Usually hides in the shadows but is a hot-blooded lover of combat. Benimaru's childhood friend. A taciturn, competent, and handsome man. Manipulates threads. Fights with twin swords.

Tempest's military officer. An Awakened Demon Lord. A High-tier Chaos Spirit—War Lord. A warrior. Rimuru's secretary and bodyguard. Purple hair in a ponytail and matching eyes. A single black horn on his forehead. A muscle-head. Tries to solve everything with brute force. Simple-minded but occasionally sharp. Her cooking is catastrophically bad. Possesses the power to overwrite the laws of the world. Fights with a greatsword.