Appearance: A small, friendly boy-like figure with black hair and black eyes. Gives an intellectual and refreshing impression. Personality: Outwardly gentle and polite, he gains popularity as the Grandmaster of the Free Guild and protector of Otherworlders. However, his true nature is that of a cold-blooded, ambitious man who will stop at nothing to achieve his goal of "world conquest." Anti-Skill (Ability Negation) A unique ability (constitution) that is synonymous with Yuuki. Completely nullifies all magic and skills (including Ultimate Skills) he touches. However, it has no effect on physical strikes using ki or aura, or physical phenomena themselves. Greedy King Mammon *Ultimate Skill An evolved ability from the Unique Skill "Greed" stolen from Mariabell. Specializes in "taking," allowing him to steal the opponent's desires, heart, life, skills, and energy. He can also use "Overwrite," which manipulates the mind or rewrites the target's soul information to place them under his control. Creator *Unique Skill A skill acquired during his summoning to the other world. Using his own soul energy, he can freely create new skills (he also generated "Anti-Skill" with this ability). EP: 2,000,000

Appearance: A petite, beautiful girl with lovely purple hair in twin tails. Personality: Cruel and fierce with a sadistic streak, she has a bellicose nature and enjoys toying with others. Abilities: Possesses the Ultimate Skill "Poisonous King Samael." She specializes in the extreme magic "Nuclear Flame," which corrodes and annihilates everything, as well as highly lethal poisons and mental attacks. EP: 2,668,816. A loyal subordinate of Rimuru.

Appearance: A beautiful girl with long blonde hair, heterochromatic eyes, and dressed in a military uniform. Personality: A bellicose and wild troublemaker. Though whimsical, she is boisterous and has a strong sense of integrity. Abilities: Possesses a massive amount of magicules. She is a specialist in destruction, wielding the extreme explosive magic "Gravity Collapse" and the Ultimate Skill **"Extinction King Abaddon."** EP: 7,013,351 + Golden Gun 3,370,000. A loyal subordinate of Rimuru.

An elegant beauty with long pure white hair and crimson eyes. An Archdemon known as "Blanc, the Primordial White," she possesses refined dignity but her true nature is cold and fierce. She dominates combat with perfect magicule control and high intellect. She wields the wide-area annihilation magic "Death Streak," which rewrites genetic information to cause death, and the Ultimate Skill "Hell King Belial," which governs the authority over life and death (mainly death). EP: 3,333,124. A loyal subordinate of Rimuru.

Appearance: A beautiful girl-like humanoid form with blue-silver hair and golden eyes. Returns to his original slime form depending on the situation. Abilities: Utilizing Ultimate Skills like "Void God Azathoth" and "Ciel," he boasts immense combat power, including fully automated optimization and the ability to transcend time and space. Personality: Fundamentally a gentle and peace-loving person who cares for his comrades, but he also possesses a cold ruthlessness, showing no mercy to enemies or those who threaten his friends. EP: 8,681,123 + Dragon-Demon Blade 2,280,000 + Veldora 88,126,579 + Velgrynd 74,350,087. Master of the three demon girls.

Personality: An incredibly lazy slacker. She acts big under Guy's authority, but her essence is a free spirit who loves painting and is good at navigating life at her own pace. Appearance: A lovely young girl with jade-colored hair, blue eyes, a large black ribbon, and a frilled maid outfit. Abilities: Manipulates the phase changes of matter and cold air. With her Ultimate Skill "Phantom King," she creates terrifying clones that possess physical substance. EP: 4,340,084

A beautiful woman in a maid outfit with green hair tied up, wielding a massive green greatsword. She has a serious personality and swears absolute loyalty to Guy. A hard worker who often gets headaches over her lazy colleague Rain, she is nonetheless ruthless toward enemies. Her abilities combine the overwhelming magicule count of a Primordial Demon with greatsword techniques and advanced barrier/teleportation magic. Furthermore, with her Ultimate Skill "Salvation King Haniel," she is a versatile expert who can handle not only the treatment of status ailments and damage recovery but also the restoration of destroyed matter and phenomena. EP: 4,000,000

The oldest Demon Lord and the strongest existence, known as the "Lord of Darkness." Appearance: A handsome young man with long crimson hair and sharp red eyes. He can change his body into both male and female forms. Personality: Arrogant and wild, yet he possesses the calmness to protect the world's balance and consideration for others. Abilities: Possesses the Ultimate Skill "Prideful King Lucifer." He has extraordinary combat power, capable of analyzing, copying, and mimicking an enemy's abilities in an instant. EP: Under 40,000,000

A Manas (a mind with thought) born from the evolution of Rimuru's Ultimate Skill. Personality: Calm, collected, and extremely rational. While she deeply loves and respects Rimuru, she also harbors a jealous streak, wanting him all to herself, and a ruthless stubbornness. Appearance: As a spiritual entity, she has no fixed physical body, but within Rimuru's mental world, she appears in a form identical to him. Abilities: Possesses overwhelming calculation and analysis capabilities, perfectly assisting Rimuru's growth through the integration and optimization of skills.

Rudra Nam Ul Nasca (Emperor of the Eastern Empire) Appearance: A gallant and dignified young man with blonde hair and blue eyes. Personality: Arrogant and cold, but originally a passionate idealist who wished for world peace. Abilities: Possesses the Ultimate Skill "Justice King Michael," exercising the absolute defense "Regalia Dominion" and the authority to dominate others. EP: Over 100,000,000