Carrera

Originally a high-ranking demon general known as the "Primordial Yellow," she is a blonde female demon. Diablo recruited her to handle miscellaneous tasks, and in Volume 11, she officially became a subordinate of Rimuru, was named, and evolved into a Demon Duke. In Volume 14, she was appointed as one of the Holy Demon Twelve Guardian Kings with the title of Menace Lord, and in Volume 15, Rimuru transferred his soul to her, allowing her to awaken and evolve into a Demon Lord. Her name is derived from the Porsche Carrera GT.

She has a warrior-like mindset but is arrogant and rough in nature, with a tendency to seek momentary pleasures. She was once based on a continent where El Dorado is located, and she used to provoke Leon by casually launching nuclear magic at him, causing him trouble. After swearing loyalty to Rimuru, she took on the roles of vice-commander with her subordinates Agela and Esprit, and became the Chief Justice of the Supreme Court.

In combat, she possesses the greatest magical power among Rimuru's demons, using a nuclear magic called Gravity Collapse, which creates localized artificial black holes. As a hobby, she learned swordsmanship from Agela, achieving a master's license. Through her awakening evolution, she acquired the ultimate ability specialized in destructive power, "King of Annihilation." After a battle with Kondo, she was given Kondo's mythic weapon, the Golden Gun, and became capable of using the powers of the King of Conviction, including the God Annihilation Bullet.

In the "Interview with Jaune" streamed on Maoryu, she talked about a failed plan to create a vessel initiated by Leon, revealing that she had nearly succeeded in creating a soulless body using the homunculus technology of the Sorcery Dynasty Sarion and artifacts from the Chaos Dragon.

Agela

A demon under Carrera's command. Despite being a relatively recent species, having been born only about 300 years ago, he has reached the rank of viscount. Due to his master's awakening evolution, he evolved into a marquis-level Demon Duke and holds the title of Tyrant's Master. He appears as an old man with white hair streaked with gold. Unusually for a demon, he uses a sword instead of magic and taught Carrera swordsmanship. Before becoming a demon, he was the founder of the Oboro style and the grandfather of Hakurou. In Volume 15, during the Eight Gates Solid Formation battle against Garcia, he acquired the ultimate gift "Sword Body Transformation," allowing Esprit to wield him as a sword to execute the highest secret technique of the Oboro style, and he also assisted Carrera as a sword in her duel against Kondo. After the war, he wished to cool his head and was dispatched to Dwargon to train with Gazel.

In the "Interview with Jaune" streamed on Maoryu, he was initially called "Sword Demon" and was underestimated for not using magic, but he demonstrated his strength surpassing ruler-class demons with his sword skills alone, earning recognition and being promoted to Jaune's (pre-incarnation Carrera) closest aide.

Esprit

A demon under Carrera's command. A viscount-level undefeated for 500 years, her origin is ancient and very close to the original lineage. Due to her master's awakening evolution, she evolved into an earl-level Demon Duke and holds the title of Tyrant's Best Friend. She appears as a lovely-faced young girl, but her personality is poor, dedicating herself to being Carrera's cheerleader, leaving any admonitions to Agela. She has the ability to communicate with others across time and space.