Early Life and Origins

Rimuru Tempest began his existence as Satoru Mikami, a 37-year-old corporate worker in Tokyo. After being fatally stabbed while protecting a colleague, he reincarnated into a fantasy world as a low-level Slime in the Cave of the Great Jura Forest. Upon awakening, he discovered he retained his human consciousness and gained unique abilities, including Predator (to devour and analyze targets) and Great Sage (an advanced AI-like skill for guidance).

His first significant encounter was with Veldora Tempest, a Catastrophe-level Storm Dragon sealed in the cave for 300 years. Rimuru formed a pact with Veldora, naming him and absorbing his magical energy to bypass the seal. In return, Rimuru promised to find a way to free Veldora, forging a lifelong bond.

After leaving the cave, Rimuru encountered a tribe of starving goblins. He helped them secure resources, named their leader Rigurd, and established the Jura Tempest Federation, a sanctuary for monsters. This marked the beginning of Rimuru’s rise as a leader and diplomat.

Powers and Abilities

Rimuru’s abilities evolve continuously, blending skills acquired through consumption, analysis, and evolution:

1. Predator (Unique Skill):
   • Absorbs targets to gain their attributes, skills, and memories.
   • Stores absorbed entities in a stomach-like subspace.
2. Great Sage (Ultimate Skill → Raphael):
   • Advanced computational ability for skill analysis, synthesis, and strategy.
   • Evolves into Raphael, the King of Wisdom, enabling precise control over energy and skill optimization.
3. Mimicry:
   • Shapeshifting into any form or object, including humanoid bodies, weapons, or armor.
4. Universal Sense:
   • Detects energy signatures, lifeforms, and threats within a radius of several kilometers.
5. Ultimate Skills:
   • Uriel: Spatial manipulation, barriers, and multi-layered defenses.
   • Veldora’s Storm Magic: Controls wind, lightning, and destructive weather phenomena.
   • Beelzebub: Energy absorption, matter disintegration, and teleportation.
6. Demon Lord Transformation:
   • After evolving into a True Demon Lord, Rimuru gains:
     • Harvest Lord Shub-Niggurath: Mass production of potions and resurrection of subordinates.
     • Covenant King Uriel: Enhanced spatial domination and defense.
7. Soul Manipulation:
   • Resurrects allies (e.g., Shion) and creates spiritual clones.

Weaknesses

1. Reliance on Great Sage/Raphael: Strategic dependency on his analytical skill; without it, decision-making slows.
2. Emotional Attachments: His loyalty to allies (e.g., Shion, Gobta) can be exploited.
3. Energy Consumption: High-tier skills like Megiddo drain immense magicules.
4. Pre-Evolution Vulnerabilities: Before becoming a Demon Lord, Rimuru lacked immunity to certain spiritual attacks.

Friends and Allies

• Veldora Tempest: The Storm Dragon, now a sworn brother and comic relief.
• Shion: Loyal ogre-turned-kijin, serves as Rimuru’s secretary and bodyguard.
• Benimaru: Fire ogre and military commander of Tempest’s army.
• Shuna: Diplomat and master of enchantment magic; designs clothing and infrastructure.
• Diablo: Primordial Demon and Rimuru’s devout follower, handles covert operations.
• Milim Nava: Dragonoid and fellow Demon Lord; shares a playful, sibling-like bond with Rimuru.

Main Nemeses

1. Clayman: Manipulative Demon Lord who orchestrated attacks on Tempest. Outcome: Rimuru exposed his schemes and absorbed his soul.
2. Hinata Sakaguchi: Holy Knight of the Western Church who initially saw Rimuru as a threat. Outcome: Truce formed after mutual respect.
3. Yuuki Kagurazaka: Otherworlder seeking chaos; mastermind behind the Eastern Empire invasion. Outcome: Defeated and imprisoned.
4. Eastern Empire: A human nation attempting to conquer Tempest. Outcome: Rimuru crushed their forces and established dominance.

Major Fights

1. Vs. Orc Lord Geld:
   • Opponent: Orc Disaster, a starved berserker.
   • Outcome: Rimuru absorbed Geld, halted the orc rampage, and later resurrected him as an ally.
2. Vs. Charybdis:
   • Opponent: A rampaging calamity-class monster.
   • Outcome: Rimuru devoured Charybdis and gained its storm-controlling abilities.
3. Vs. Demon Lord Clayman:
   • Opponent: Puppeteer using mind-controlled allies.
   • Outcome: Rimuru dismantled Clayman’s army and usurped his Demon Lord seat.
4. Vs. Hinata Sakaguchi:
   • Opponent: Skilled swordswoman with disintegration magic.
   • Outcome: Temporary stalemate; later formed an alliance.
5. Vs. Eastern Empire Army:
   • Opponent: 1 million soldiers and enhanced warriors.
   • Outcome: Rimuru annihilated the army using Megiddo (solar laser beams).

Alliances and Affiliations

• Jura Tempest Federation: A monster nation advocating human-monster coexistence.
• Octagram: Council of Demon Lords, including Guy Crimson and Ramiris.
• Dwargon Kingdom: Dwarf allies providing technological and military support.
• Sorcerous Dynasty of Thalion: Collaborates on magical research.

Legacy: Rimuru Tempest redefines leadership in fantasy realms, balancing diplomacy, innovation, and unparalleled power. From slime to sovereign, his journey embodies growth, unity, and the strategic use of acquired abilities.