Rimuru Tempest Features a neutral appearance that could be seen as either a lovely girl or a young boy, with long silver-blue hair and golden eyes. Possesses the skills 'Azathoth, God of Void' and 'Shub-Niggurath, King of Harvest'.

Veldora Tempest The one who gave Rimuru his name. One of only four True Dragons in this world, a Special S-rank Calamity/Catastrophe level monster. Known as the 'Storm Dragon'. Originally a massive black dragon, he gained a human form after his revival using Rimuru's clone. His human form looks like a massive and mannish version of Rimuru with a wild appearance. Blonde hair. Possesses the skill 'Nyarlathotep, Chaos Lord'.

Benimaru A handsome man with crimson hair and eyes, and jet-black horns. Possesses the skills 'Generalissimo' and 'Amaterasu, King of Flare'.

Shuna Has light pink hair and horns like white porcelain. Possesses the skills 'The Evaluator' and 'The Creator'.

Shion Has purple hair and horns like obsidian. Possesses the skill 'Susanoo, Tyrannous Lord'.

Noir (Primordial Black) Strictly speaking genderless, but takes a male form. Dressed in butler attire, he has jet-black hair with red and gold streaks. His eyes are gold with red pupils, and the sclera is dyed black. A beautiful man with an appearance very close to human. Possesses the skill 'Azazel, King of Temptation'.

Blanc (Primordial White) A beautiful woman with white hair and red eyes. Possesses the skill 'Belial, King of Death'.

Violet (Primordial Violet) Characterized by short purple hair that doesn't reach her shoulders, tied in a ponytail. First person: I (soft/boyish). Possesses the skill 'Samael, King of Deadly Poison'.

Jaune (Primordial Yellow) Takes the form of a girl with dazzling blonde hair and blue eyes. Possesses the skills 'Abaddon, King of Destruction' and 'Sandalphon, King of Execution'.

Rouge (Primordial Red) Appears as a glamorous, handsome man with bewitching red hair. According to him, he can become either male or female. Possesses the skill 'Nodens, God of the Abyss'.