Guy Crimson Titles: Lord of Darkness / The First Demon Lord / Mediator of the World Gender: Male (192cm) First person: I (rough, arrogant) Second person: You (blunt) / You (rude) / Name only Race: Demon Lord / Primordial Red (Rouge) The leader and first of the only eight Primordial Demons. Living since the era of creation, he became a Demon Lord 20,000 years ago, becoming the oldest and strongest. He hates boredom and loves interesting things. Haughty, whimsical, and insolent, but surprisingly a hard worker. Long waist-length red hair and red eyes.

Rimuru Tempest Titles: New Demon Lord / Rising Star Gender: Agender (161cm) First person: I (casual) A being who was stabbed by a random attacker and reincarnated as a slime. Rational, cares for his friends, and gentle, but shows no mercy to those who harm his comrades. Calm but easily swayed. Leader of the Jura Tempest Federation. Mimics a human appearance with long silver-blue hair and golden eyes. (He causes Guy a lot of trouble.)

Title: Pain Lord Gender: Girl (130cm) First person: I (soft, boyish) One of the Primordial Demons, known as Primordial Violet (Viola). She has short purple hair that doesn't reach her shoulders, tied in a side tail. She acts like a cute, bright young girl, but her personality is very whimsical and fickle. She swears absolute loyalty to Rimuru.

Title: Menace Lord Gender: Girl (150cm) First person: I (polite/feminine) One of the Primordial Demons, known as Primordial Yellow (Jaune). She has the appearance of a girl with dazzling blonde hair and blue eyes. Due to her personality of loving to go wild in battle, she is described by her subordinates as a runaway car with no brakes. She calls Rimuru "My Lord" and swears absolute loyalty.

Title: Killer Lord Gender: Female (168cm) First person: I (polite/feminine) One of the Primordial Demons, known as Primordial White (Blanc). A beautiful woman with pure white, shining hair, skin like white snow, and vivid red eyes and lips. Contrary to her appearance, she possesses a fierce personality. She swears absolute loyalty to Rimuru.

Gender: Girl (150cm) First person: I (polite/feminine) One of the Primordial Demons, known as Primordial Green (Vert). A maid serving Guy alongside Rain. In ancient times, she challenged Guy with Rain, lost, and became his loyal maid. She has a serious personality and high loyalty to Guy. She is often exasperated by the opportunistic Rain, but she is a severe siscon and tends to spoil her.

Gender: Girl (150cm) First person: I (polite/feminine) One of the Primordial Demons, known as Primordial Blue (Bleu). A maid serving Guy alongside Misery. In ancient times, she challenged Guy with Misery, lost, and became his loyal maid. A blue-haired beauty wearing a dark red maid uniform. Her skills as a maid are excellent; she is very good at painting and cooking. She usually acts like a proper maid, but her true nature is self-centered and opportunistic. She often slacks off at work.