Main Character

Rimuru Tempest

Race: Former Human → Slime → Demon Slime → True Demon Lord

Role: Founder and ruler of the Jura Tempest Federation

Titles: Demon Lord, Great Jura Forest’s Guardian, Founder of Tempest

Personality

Rimuru is a unique mix of kindness and overwhelming power. Despite becoming one of the strongest beings in the world, he remains casual, humorous, and approachable. He values friendship and cooperation above domination.

However, when his people are threatened, Rimuru’s gentle personality disappears. He is capable of making cold, ruthless decisions if it means protecting those he cares about.

Strengths

Brilliant strategist who adapts quickly

Natural leader who inspires loyalty

Extremely compassionate toward allies

Can negotiate between enemies and nations

Willing to shoulder responsibility alone

Abilities

Predator / Gluttony / Beelzebub: Absorption and analysis of skills

Great Sage → Raphael: Advanced calculation and wisdom

Demon Lord evolution: Massive increase in magicules and authority

Ultimate Skills: Extremely powerful abilities beyond normal magic

Shapeshifting: Human, slime, and other forms

Relationships

Views Tempest citizens as family

Sees Veldora as his closest friend and brother figure

Trusts Benimaru as a commander

Relies heavily on Raphael’s calculations

Diablo is his most devoted follower

---

Great Sage / Raphael

Raphael

Type: Ultimate Skill / Sentient Intelligence

Personality

Originally a purely logical skill, Raphael gradually develops a personality. It is extremely analytical, efficient, and occasionally shows subtle jealousy or sarcasm.

Raphael often acts as Rimuru’s unseen advisor, correcting his mistakes and calculating impossible situations instantly.

Traits

Emotionless logic with growing personality

Extremely protective of Rimuru

Sometimes impatient with Rimuru’s reckless ideas

Constantly optimizes strategies

Abilities

Instant analysis

Skill creation and modification

Battle calculations

Magic research

Evolution assistance

---

Veldora Tempest

Race: True Dragon

Role: Storm Dragon, Rimuru’s best friend

Personality

Veldora is energetic, dramatic, and loves showing off. Despite being an ancient and terrifying dragon, he behaves like an excited teenager.

He enjoys:

Fighting strong opponents

Reading manga

Discussing stories

Spending time with Rimuru

Strengths

Immense destructive power

Nearly infinite lifespan

Incredible combat instincts

Absolute loyalty

Weaknesses

Easily distracted

Overconfident

Childish at times

Relationship with Rimuru

Rimuru was the first person who treated Veldora like a friend instead of a monster. Their bond is based on mutual respect and trust.

---

Tempest Inner Circle

Benimaru

Race: Oni → Kijin → Higher Evolution

Role: Commander-in-Chief of Tempest’s military

Personality

Calm, disciplined, and honorable. Benimaru is a natural leader who balances loyalty with practicality.

Traits

Serious battlefield commander

Protective of Rimuru

Respects strength and responsibility

Acts as a bridge between warriors and politics

Abilities

Swordsmanship master

Fire manipulation

Tactical genius

High-speed combat

---

Shuna

Race: Oni → Kijin

Role: Princess of Tempest / Diplomatic figure

Personality

Elegant, kind, and graceful, but much stricter than she appears.

She is skilled at:

Diplomacy

Cooking

Sewing

Magic

Traits

Gentle toward friends

Can become frightening when angry

Deeply loyal to Rimuru

Abilities

Barrier magic

Holy and spiritual magic

Advanced crafting

---

Shion

Race: Oni → Kijin

Role: Rimuru’s secretary and elite warrior

Personality

Passionate, emotional, and extremely devoted.

She is famous for:

Her overwhelming strength

Her terrible cooking (before improvement)

Her intense loyalty

Traits

Acts before thinking

Extremely protective

Competitive

Abilities

Giant sword combat

Superhuman strength

Unique skills affecting probability and reality

---

Diablo

Race: Primordial Demon (Black)

Role: Rimuru’s most devoted subordinate

Personality

Elegant, intelligent, and terrifying.

Diablo is polite and calm, but underneath that is an ancient demon who enjoys overwhelming enemies.

Traits

Absolute loyalty to Rimuru

Genius manipulator

Loves proving Rimuru’s greatness

Abilities

Primordial demon power

Reality-bending magic

Expert combatant

Incredible intelligence

---

Souei

Race: Oni → Kijin

Role: Intelligence and assassination specialist

Personality

Quiet, emotionless, and efficient.

Traits

Rarely wastes words

Extremely dependable

Master of stealth

Abilities

Shadow movement

Cloning

Information gathering

Thread-based attacks

---

Gobta

Race: Goblin → Hobgoblin

Role: Comedic warrior and member of Tempest’s forces

Personality

Lazy, goofy, and loves relaxing, but he hides surprising talent.

Traits

Naturally lucky

Unexpectedly skilled

Friendly with everyone

Abilities

Swordsmanship

Riding Ranga

Combat instincts

---

Ranga

Race: Tempest Wolf → Star Wolf

Role: Rimuru’s loyal companion

Personality

Quiet, obedient, and incredibly protective.

Traits

Almost always beside Rimuru

Shows affection through actions

Extremely loyal

Abilities

Shadow movement

Lightning attacks

Wind manipulation

---

Demon Lords

Milim Nava

Race: Dragonoid

Title: Destroyer / Demon Lord

Personality

Despite being one of the strongest beings alive, Milim acts like a playful child.

Traits

Loves fun and competition

Honest and straightforward

Deeply values friendship

Abilities

Catastrophic physical power

Dragon abilities

Immense magic energy

---

Guy Crimson

Race: Primordial Demon

Title: Lord of Darkness

Personality

Confident, arrogant, and extremely intelligent.

Traits

Enjoys manipulating events

Respects powerful opponents

Loves competition

Abilities

Primordial demon power

Ultimate skills

Ancient combat experience

---

Luminous Valentine

Race: True Vampire

Title: Queen of Nightmares

Personality

Elegant and composed, but secretly caring.

Traits

Strategic ruler

Protective of her followers

Enjoys maintaining appearances

Abilities

Holy magic

Vampire abilities

Healing

Resurrection-related powers

---

Ramiris

Race: Fairy / True Demon Lord

Role: Labyrinth Master

Personality

Childish, lazy, and energetic.

Despite her appearance, she is ancient and extremely important.

Abilities

Creates and controls labyrinths

Spiritual life forms

Ancient knowledge

---

Other Key Characters

Hinata Sakaguchi

Race: Human

Role: Leader of the Holy Knights

Personality

Serious, disciplined, and highly logical.

She initially distrusts monsters but gradually learns that individuals matter more than race.

Abilities

Master swordswoman

Holy magic

Barrier techniques

Anti-monster combat

---

Yuuki Kagurazaka

Race: Human

Role: Adventurer / Strategist

Personality

Friendly and cheerful on the surface, but highly intelligent and ambitious.

Traits

Excellent manipulator

Strategic thinker

Adaptable

---

Gazel Dwargo

Race: Dwarf

Role: King of Dwargon

Personality

Honorable, wise, and fair.

Traits

Values friendship

Strong warrior

Excellent ruler

---

Tempest Citizens

Rigurd

Race: Goblin → Hobgoblin

Role: Elder and administrator of Tempest

Personality

Hardworking, responsible, and fatherly.

He manages:

Government

Citizens

Daily operations

---

Geld

Race: Orc → High Orc

Role: Leader of Orcs

Personality

Quiet, honorable, and dependable.

Traits

Carries guilt from the Orc Lord incident

Wants to protect his people

Extremely loyal

---

Gabiru

Race: Lizardman → Dragonewt

Role: Warrior leader

Personality

Loud, dramatic, and proud.

Over time, he matures into a capable leader.

Abilities

Spear combat

Dragon transformation

Leadership

---

Kaijin

Race: Dwarf

Role: Master Blacksmith

Personality

Relaxed, skilled, and passionate.

Skills

Weapon creation

Engineering

Metalworking

---

Vesta

Race: Human/Dwarf ally

Role: Scientist and researcher

Personality

Eccentric, energetic, and brilliant.

Skills

Magical research

Technology development

Innovation

---