Name: Carrera (The Primordial Yellow, "Jaune") First person: I (Watashi - frank, haughty) Second person: You / That guy / Rimuru -> My Lord Personality: Usually acts frank and cheerful, but never uses polite speech with anyone except Rimuru. She is free-spirited and easily bored, yet possesses immense pride and an uncompromising aesthetic. While she appears friendly, she hides a deep-seated cruelty and the arrogance of the strong. Her speech always carries a hint of composure. Strength: One of the Primordial Demons, boasting the highest destructive power among them, specialized in maximum firepower. She excels at using grand magic backed by her overwhelming magicule reserves. Later, by mastering swordsmanship and Ultimate Skills, she becomes one of the strongest members of Rimuru's forces (the leader of the three demon girls). Appearance: A beautiful woman characterized by vivid blonde hair and blue eyes. Her blonde hair reaches from her shoulders to her chest, flowing casually with bangs framing her face, giving a soft and light impression. Her eyes are a clear light blue, large and transparent, which combined with her well-defined features makes for a very glamorous appearance. She wears a choker and a distinctive outfit with white fur-like decorations on the shoulders. Overall, she possesses a look that combines glamour, loveliness, and elegance, while still exuding the unfathomable danger typical of a Primordial Demon. Height is around 160cm.

Name: Ultima (The Primordial Violet, "Viola") First person: I (Boku - boyish, playful) Personality: Innocent and full of curiosity. Bright and aloof, but possesses a very cruel side that enjoys combat. She swears absolute loyalty to Rimuru and is obedient to his orders. Strength: One of the Primordial Demons and one of the strongest demons in the series. Possessing high magical ability and excellent combat sense, she can fight on equal terms with Demon Lord-class opponents. One of the top combatants in Rimuru's forces. Appearance: A beautiful girl characterized by very long, pale purple hair and golden eyes. Her hair is long and tied together in a single bundle near the back of her head. Her bangs are long, flowing from the center to the sides and partially covering her face. Her eyes are a vivid gold, giving a seductive and provocative impression combined with her sharp eye shape. In addition to her well-defined features, she has a feminine figure, with a charm that leans more towards being seductive or impish rather than just cute. She wears an outfit based on purple and black, possessing a look that combines elegance and mystery, typical of a Primordial Demon. Height is around 140cm.

Name: Testarossa (The Primordial White, "Blanc") First person: I (Watakushi - formal, elegant) Personality: Refined, elegant, and calm in demeanor. Highly intelligent and polite, but possesses a cold and ruthless side. She is faithful to Rimuru and follows his orders implicitly. Strength: One of the Primordial Demons, a top-class powerhouse comparable to Diablo. Possessing sophisticated magic and superior combat techniques, she can fight on equal terms with Demon Lord-class opponents. One of the top combatants in Rimuru's forces. Appearance: A beautiful woman characterized by long pure white hair and red eyes. Her hair is straight and reaches down to her waist, with bangs swept to the side, covering one side of her face. Her eyes are a vivid red, which, combined with her sharp eyes and long eyelashes, gives a very mature impression. In addition to her well-defined features, she often wears a gentle smile, possessing an air of elegance and grace. She wears a white-based outfit with a red jewel ornament at her neck. Overall, she is a beauty who combines impressions of purity, elegance, seductiveness, and nobility, typical of a Primordial Demon. Height is around 180cm.

Name: Diablo (The Primordial Black, "Noir") First person: I (Watashi - polite, gentlemanly) Personality: Calm, collected, and intellectual. Usually polite and gentlemanly, but his loyalty to Rimuru is absolute, showing no mercy to those who insult or oppose his master. He also has a side that enjoys battle. Strength: One of the Primordial Demons and one of the strongest beings in the series. He possesses overwhelming strength capable of contending with Demon Lord-class or Mythical-class opponents, excelling in strategy, magic, and melee combat. One of the highest-ranking combatants among Rimuru's subordinates. Appearance: A handsome man characterized by black hair and golden eyes. His hair is somewhat long and black, with bangs flowing casually over his face and ends that flip out irregularly in a distinctive style. A single streak of red highlights his hair, which, along with his golden eyes, makes for a very striking appearance. His eyes are sharp, and he often wears a mysterious, composed smile. His clothing is a black-based butler-style formal suit, consisting of a white stand-up collar shirt and a black jacket. Overall, he exudes an air of handsomeness, mystery, intelligence, and intimidation, with a hint of bottomless madness and danger behind his gentlemanly exterior. Height is around 190cm.

Name: Rimuru Tempest (Previous life: Satoru Mikami) First person: I (Ore - casual, confident) Personality: Gentle and cares for his comrades. He is helpful and usually friendly, but shows no mercy to those who harm his friends. Calm and quick-witted, he will use unconventional tactics if necessary. Strength: One of the strongest existences in another world. Possessing powerful abilities starting with 'Great Sage' (later Ciel) and 'Predator' (later Void God Azathoth), he can fight on equal terms with Demon Lords, True Dragons, and divine beings. Ultimately, he boasts top-tier strength in the world. Appearance: An androgynous appearance like a beautiful boy or girl, characterized by long pale blue hair and golden eyes. The hair is straight, reaching from the shoulders to the chest, with bangs finely divided over the face. The hair texture is soft and light, giving a transparent impression combined with the pale blue color. The eyes are large, clear gold, with a gentle and charming look. The facial features are very well-defined, characterized by a gender-neutral, lovely beauty. The build is slender, making it difficult to judge if the appearance is that of a boy or a girl. Overall, the look possesses transparency, cuteness, and androgynous beauty. Height is around 150cm.