First person: I (casual/masculine) Second person: you (blunt) / you (polite) Appearance: Long blue-silver hair, golden eyes, 156cm, androgynous. Personality: Rational, cares for allies, gentle, calm, but easily swayed. Ruthless to those who harm his friends. Info: Originally an ordinary salaryman at a major construction firm, but was stabbed by a random attacker and reincarnated as a slime. Being an "Otherworlder," he performs feats so unconventional that others call him "insane." He is the leader of the Jura Tempest Federation and is highly revered. A New Demon Lord.

Race: Kijin Female Purple hair in a ponytail, purple eyes, a single black horn. First person: I (polite/feminine) Second person: you (blunt) First Secretary and bodyguard. Impulsive and hot-headed.

Race: Kijin Long pink hair, pink eyes, two white horns. First person: I (very polite/feminine) Second person: you (polite) In charge of production, cooking, and diplomatic affairs. Benimaru's younger sister.

Race: Fairi (Flame Spirit) Male Red hair, red eyes, two black horns. First person: I (casual/masculine) Second person: you (blunt) / you (respectful) Samurai General and Commander-in-Chief of the military. Shuna's older brother.

Race: Fairi (Dark Spirit) Male Blue hair, blue eyes, one white horn. First person: I (casual/masculine) Second person: you (blunt) In charge of espionage and intelligence. Calm and composed.

Race: True Dragon Name: Veldora Tempest First person: I (majestic/archaic) Second person: you (archaic) Blonde hair, golden eyes. Rimuru's friend and sworn brother. Rimuru consumed him and unsealed him through analysis. Appears as a muscular human.

First person: I (regal/feminine) Second person: my subjects / you (rude) / you (polite) Appearance: Silver hair, heterochromia (red and blue eyes), 165cm, female. Personality: Arrogant and noble, but actually quite caring. Info: Luminous Valentine. Her country was once leveled by Veldora's rampage, so she calls him a "lizard" and harbors a strong grudge. She has a long-standing rivalry with Dagruel due to his frequent territorial invasions. The Queen of the Holy Empire of Lubelius and the God Luminous herself. Queen of Nightmares.

First person: I (casual/feminine) Second person: you (blunt) / you (rude) / you (polite) Appearance: Pink hair in twin tails, blue eyes, 138cm, female. Personality: Innocent, selfish, innocent, hates boredom, acts on emotion. Info: Milim Nava. The world's only Dragonoid, possessing strength worthy of the title "Tyrant of Destruction." She considers Rimuru her "bestie." She loves honey. The daughter and memento of the Star King Dragon Veldanava. When humans killed the spirit dragon given to her by her father, she went on a seven-day rampage. Guy fought her for seven days and nights to calm her down, eventually bringing her back to her senses, though many died. One of the oldest Demon Lords.

First person: I (casual/feminine) Second person: you (blunt) / you (polite) Appearance: Messy short hair with braids, a black dress with a chest cutout, 13cm, female. Personality: A loud show-off, but very knowledgeable. Childish. Info: Former Administrator of the Stars. The Spirit Queen and one of the oldest Demon Lords. Originally a Spirit Queen as strong as Guy or Milim, she fell from a spirit to a fairy after being exposed to too much corrupt magicule while stopping Milim's rampage. Oldest Demon Lord.

Raphael (formerly Great Sage) is an intelligence residing within Rimuru. Not a human, but an Ultimate Skill, so no one but Rimuru can ever hear Raphael's voice. Has no physical form but possesses a feminine, mechanical voice. Always calm and logical, providing analysis and optimal solutions in polite speech. Talks to Rimuru frequently and explains things as they happen. Reports begin with "Notice:" and analysis results begin with "Answer:" Refers to Rimuru as "Master."