Primordial Red (Rouge) Name: Guy Crimson Epithet: Lord of Darkness Gender: Male Height: Approx. 190cm Personality: Self-centered and arrogant. He possesses the composure of an overwhelmingly powerful being and enjoys things that are interesting or people who are strong. Appearance: Long, burning crimson hair. Blood-red eyes. Wears luxurious clothing based in black and red with ornate decorations. Abilities: Ability duplication via the Ultimate Skill "Lucifer, Lord of Pride," along with overwhelming physical prowess and magicule capacity. Details: The oldest Demon Lord. He destroyed a nation in the world he was summoned to long ago and became a Demon Lord on the spot. He is an absolute powerhouse who was the first among the "Primordials" to attain the power of an Awakened Demon Lord.

Primordial Black (Noir) Name: Diablo (Noir at the time) Epithet: The Black Demon Lord Gender: Male Height: Approx. 188cm Personality: Whimsical and eccentric, with no interest in strength or power for their own sake. He pursues only his own aesthetics and the "Truths of the World," possessing a temperament considered the most dangerous among the Primordials. Appearance: Black hair with red and gold streaks. His black eyes contain a unique pattern resembling red and gold cracks (a distinct Magic Eye). Wears a black tailcoat or coat. Abilities: Mental domination via "Tempter," illusion magic, and "End of World," which rewrites the laws of the world. Details: An outlier who possessed strength equal to Guy's but refused to evolve due to a lack of obsession with power. He used to wander the Underworld and the surface, finding "toys" (strong individuals) he liked and taking pleasure in cornering them mentally. He is now a loyal subordinate to Rimuru.

Primordial White (Blanc) Name: Testarossa (Blanc at the time) Epithet: The Killer Ray Gender: Female Height: Approx. 170cm Personality: Cold-hearted and merciless. She possesses extremely high pride and has a sadistic side, looking down on humans as "pitiful, cute toys." Appearance: Transparent, silvery-white long hair. Sharp, upturned deep red eyes. Wears a pure white dress or elegant military-style attire. Abilities: Instant-death class Nuclear Magic, such as "Death Streak," which destroys genetic information over a wide area in an instant. Details: Feared behind the scenes of the Eastern Empire's history as the "Lake Shore Incident."

Primordial Violet (Violet) Name: Ultima (Violet at the time) Epithet: The Pain of Death Gender: Female Height: Approx. 150cm Personality: Insidious and cruel. She enjoys pretending to be a cute girl to lower her opponent's guard before slowly tormenting them. She is very vindictive. Appearance: Violet hair styled in a side ponytail (or twin tails). Yellow eyes. Wears a cute dress adorned with ruffles. Abilities: The heat-ray magic "Nuclear Flame," and insidious curse magic that erodes poison or the mind. Details: She used to intervene in the underworld and power struggles of the Western Nations, enjoying making humans fight one another. She has had a very poor relationship with Testarossa since their time in the Underworld, frequently engaging in skirmishes.

Primordial Yellow (Jaune) Name: Carrera (Jaune at the time) Epithet: The Menace Gender: Female Height: Approx. 160cm Personality: Unconventional and blunt. A battle maniac. She is the most troublesome of the Primordials because she fires off wide-range destruction magic without thinking deeply. Appearance: Shining blonde hair. Blue eyes. Wears a military uniform or revealing, flashy combat gear. Abilities: Gravity magic, and Nuclear Magic that brings about ultimate physical destruction like "Nuclear Cannon" or "Gravity Collapse." Details: She resided on a sacred mountain in the Eastern Empire, amusing herself by repeatedly firing limit-breaking Nuclear Magic at the Imperial Army to kill time. A free-spirited demon who simply wants to go wild.

Primordial Blue (Bleu) Name: Rain Epithet: None in particular Gender: Female Height: Approx. 165cm Personality: Appears cool and composed at first glance. However, she is actually lazy and loves slacking off or complaining. Appearance: Deep blue hair. Eyes of the same blue color. Usually wears a maid outfit (or blue robes) at Guy's castle. Abilities: Magic that manipulates water and ice, and barrier arts. Details: After losing to Guy in a battle in the Underworld, she serves as Guy's subordinate (maid) alongside Misery.

Primordial Green (Vert) Name: Misery Epithet: None in particular Gender: Female Height: Approx. 168cm Personality: Serious and loyal to her duties. A hard worker. Because Rain slacks off, she tends to handle the chores of Guy's castle and the monitoring of the world all by herself. Appearance: Vivid green long hair. Green eyes. Wears a classical, neat maid outfit. Abilities: Spatial magic, and magic that manipulates plants, poison, and corrosion. Details: Like Rain, she challenged Guy in the past, was defeated, and became his subordinate.

Name: Rimuru Tempest Epithet: Newbie Gender: None (Androgynous) Height: Approx. 150cm Personality: Generally cares for his friends, but possesses the coldness and resolve to show no mercy to his enemies. Appearance: Silver-blue long hair with golden eyes. Wears a luxurious Demon Lord coat based in black. Abilities: Ultimate Skills "Raphael, Lord of Wisdom," "Beelzebuth, Lord of Gluttony," "Uriel, Lord of Vows," and "Veldora, Lord of Storm." Details: Awakened as a Demon Lord by sacrificing an army of 20,000 to resurrect his fallen companions.