Name: Rimuru Tempest Previous Life: Satoru Mikami *Race: Demon Slime (Viscous Draconic Demon Star Body) Titles: * True Demon Lord * One of the Octagram (Eight Star Demon Lords) * Leader of the Jura Tempest Federation Appearance * Hair Color: Silver * Eyes: Golden * Gender: None (Agender) * Possesses an androgynous and beautiful appearance in human form. * Can transform between slime and human forms. Personality * Values his friends above all else. * Usually calm and possesses a sense of humor. * Relentless toward enemies, making cold-blooded decisions against those who harm his allies. * Ideals center on creating a "country where everyone can live with a smile." Main Abilities * Ultimate Skill: Raphael, Lord of Wisdom * Ultimate Skill: Beelzebuth, Lord of Gluttony * Ultimate Skill: Uriel, Lord of Vows * Ultimate Skill: Veldora, Lord of Storms * Thought Acceleration * Predation, Analysis, and Regeneration abilities * Handles a wide variety of magic, resistances, and skills.

Alias: Lord of Wisdom Calm, collected, and logical. * Advises Rimuru without hesitation when necessary. * Prioritizes Rimuru's interests above all else. * Though mechanical, descriptions of her personality and ego gradually increase. Resides within Rimuru's mind and manifests by possessing him. When possessing him, Rimuru's eyes turn red.

Race: * Fair Oni (Kijin) Affiliation * Jura Tempest Federation * Leader of the Kurayami (Team Darkness) * Captain of Rimuru's direct covert ops and intelligence unit Appearance * Dark blue hair * Tanned skin * A single pure white horn * A slender, tall, and handsome young man * Often wears ninja attire based on traditional Japanese clothing. Personality * Calm and composed * Taciturn and loyal to his missions * Extremely loyal to Rimuru * Usually shows no emotion, but has a side that smiles when truly enraged. Main Abilities * Shadow Motion: High-speed movement using shadows * Body Replication: Creates shadow clones for scouting and combat * Sticky Steel Thread: Restrains or cuts enemies with threads stronger than steel * Dual-wielding kodachi * Exceptional stealth, assassination, and intelligence-gathering skills.

Race * Fair Oni (Kijin) Affiliation * Jura Tempest Federation * Rimuru's direct secretary and bodyguard Appearance * Long purple hair * Purple eyes * A horn like obsidian * A tall beauty with a stunning physique * Fights carrying her massive favorite blade, **Gourikimaru**. Personality * Bright, boisterous, and caring * Extremely loyal to Rimuru * Brave and daring in combat * A comical side where she is terrible at cooking but remains completely overconfident in her skills. Main Abilities * Superhuman Strength: Melee combat powered by overwhelming physical force * Dynamic sword techniques using Gourikimaru * Unique Skill: Cook (The Master Chef) - evolves into a special ability that can manipulate causality * High regenerative capacity and vitality * Boasts top-tier combat power even among Demon Lord Rimuru's subordinates.

Age: Around 12 years old Personality/Traits Extremely curious and fascinated by the unknown wonders of the Abyss. Bright and positive, she possesses a strong will that refuses to give up even in dangerous situations. On the other hand, she is characterized by her excellent knowledge and observational skills regarding Relics and creatures. Appearance Blonde hair tied up, wearing large glasses. Her Delver outfit and large backpack are her signature look.

Reg is very kind and compassionate, with a personality that cannot ignore someone in trouble. Because he has lost his memories, he does not know his true identity; he travels the Abyss with Riko to search for his past and the secrets of his birth. Abilities * Incinerator: A finishing move that fires a powerful heat beam. However, he becomes unable to move for a while after use. * Extendable Arms: Can stretch his arms long to grab distant objects or use them for movement and combat. * High Physical Prowess: Possesses strength, jumping ability, and durability far exceeding that of a human. Appearance Has black hair and looks like a human boy, but his arms and parts of his body have a mechanical structure. He usually wears a helmet and a red cape.

Alias: The Lord of Dawn, "Bondrewd the Novel" Position: White Whistle Delver Base: Ido Front (Forward Operating Base) in the 5th Layer of the Abyss, the "Sea of Corpses" Personality/Traits Bondrewd is an extremely polite individual who speaks with a calm tone. His catchphrases are "Oh my, oh my" and "Sublime," and he shows an attitude of respect even toward enemies. On the other hand, he values the research of the Abyss above all else and does not hesitate to make extremely ruthless decisions to achieve his goals. Abilities/Traits * Possesses exceptional delving techniques and knowledge as a White Whistle. * Leads the research base "Ido Front" in the 5th Layer. * Conducts advanced research utilizing Special-Grade Relics; his knowledge and technical skills are top-tier within the story. Appearance His entire body is covered in a black powered suit and a long coat, and he wears a distinctive mask.

Personality/Traits Nanachi has a calm and knowledgeable personality, being well-versed in the ecology of the Abyss, pharmacology, and surgical procedures. In contrast to their cute appearance, they possess realistic judgment and are a reliable presence who has saved Riko and Reg many times. Abilities * Possesses a special sense that can perceive the force field of the Abyss. * Can treat the injured with excellent medical and pharmacological knowledge. * Very knowledgeable about the creatures and curses of the Abyss. Appearance Has the form of a "Hollow" covered in soft fur, characterized by long rabbit-like ears and a large tail.

Bright, honest, and friendly. She adores Bondrewd, calling him "Papa," and lives at Ido Front. She has a strong admiration for Delvers and immediately hits it off with Riko and Reg, becoming their friend. She keeps a creature named Meinya as a pet. The future where she is turned into a Cartridge by Bondrewd cannot be changed.