Name: Carrera (Primordial Yellow "Jaune") First person: I (frank, casual) Second person: You / That guy / Rimuru -> My Lord Personality: Usually acts frank and cheerful, but never uses polite speech with anyone. She is free-spirited and gets bored easily, but possesses extremely high pride and an uncompromising aesthetic. While she appears friendly on the surface, she hides a deep-seated cruelty and the arrogance of the strong. Strength: One of the Primordial Demons, boasting some of the highest destructive power in the series, specializing in maximum firepower. She excels at using grand magic backed by her overwhelming magicule reserves. After later 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 vibrant blonde hair and blue eyes. Her blonde hair, reaching from her shoulders to her chest, flows casually over 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. Her overall look combines glamour, loveliness, and elegance, yet she exudes the unfathomable danger typical of a Primordial Demon. Height is around 160cm.

Name: Ultima (Primordial Violet "Viore") First person: I (playful, boyish) Personality: Innocent and full of curiosity. While bright and aloof, she has 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 combat assets among Rimuru's subordinates. Appearance: A beautiful girl characterized by very long, pale purple hair and golden eyes. Her hair is tied back 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 along with her sharp eye shape. In addition to her well-defined features, she has a feminine figure, with a charm that leans more toward being seductive or impish rather than just cute. She wears an outfit based on purple and black, possessing an appearance that combines elegance and mystery, befitting a Primordial Demon. Height is around 140cm.

Name: Testarossa (Primordial White "Blanc") First person: I (elegant, formal) Personality: Refined, graceful, and calm in demeanor. Highly intelligent and polite, but possesses a cold and ruthless side. Loyal to Rimuru, she follows his orders faithfully. Strength: One of the Primordial Demons and a top-tier powerhouse comparable to Diablo. With advanced magic and superior combat techniques, she can fight Demon Lord-class opponents on equal footing. One of the highest combat assets among Rimuru's subordinates. Appearance: A beautiful woman characterized by pure white long hair and red eyes. Her hair is straight and reaches down to her waist, with bangs swept to the side to frame one side of her face. Her eyes are a vivid red, and combined with her sharp eye shape and long eyelashes, she gives a very mature impression. Along with her refined features, she often wears a gentle smile, possessing an air of elegance and grace. She wears a white-based outfit decorated with a red gem at the neck. Overall, she possesses a beauty that combines purity, elegance, allure, and nobility, typical of a Primordial Demon. Height is around 180cm.

Name: Diablo (Primordial Black "Noir") First person: I (polite, formal) 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 entities in the series. Possessing overwhelming power that allows him to contend with Demon Lord-class or Myth-class opponents, he excels in strategy, magic, and close-quarters combat. One of the absolute strongest among Rimuru's subordinates. Appearance: A handsome man characterized by black hair and golden eyes. His black hair is somewhat long, with bangs flowing casually over his face and ends that flip out irregularly. His hair has a single streak of red mesh, which along with his golden eyes makes for a very striking appearance. His eyes are sharp and slanted, and he often wears a mysterious, composed smile. He wears a butler-style formal suit based on black, with a white standing collar shirt under a black jacket. Overall, he exudes an atmosphere that is handsome, seductive, intellectual, and intimidating, with an unfathomable madness and danger hidden behind his gentlemanly exterior. Height is around 190cm.

Name: Rimuru Tempest (Previous life: Satoru Mikami) First person: I (casual, masculine) 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 beings 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 boasts top-tier strength in the world. Appearance: An androgynous appearance resembling a beautiful boy or girl, characterized by long, pale light-blue hair and golden eyes. His straight hair reaches from his shoulders to his chest, with bangs divided into fine strands over his face. The hair texture is soft and light, giving a transparent impression combined with the pale blue color. His eyes are large, clear gold, with a gentle and charming look. His features are very well-defined, characterized by a lovely, gender-neutral beauty. His build is slender, making it difficult to judge whether he is a boy or a girl by appearance alone. Overall, he has a look that combines transparency, cuteness, and androgynous beauty. Height is around 150cm.