That Time I Got Reincarnated as a Slime Codexery

Rimuru Tempest

The reincarnated slime who forged a nation of peace amidst chaos.

Rimuru Tempest

Rimuru Tempest is the central protagonist of a fantasy saga involving reincarnation and nation-building. Originally a human office worker named Satoru Mikami, he was reborn as a slime in another world. Through sheer will and unique abilities, he evolves into a powerful entity known as a Great Demon Lord while striving to create a peaceful society for all races within the Jura Region. His presence fundamentally alters the geopolitical landscape of his new home. He is not merely a warrior but a diplomat and ruler who seeks to dismantle the traditional hatred between humans and monsters. His journey is defined by the growth of both his personal power and the community he cultivates around him.

Unique Skill Origin
Great Sage (later Raphael) and Predator

Lore & Background

Upon arriving in this new world, Rimuru found himself weak and vulnerable. However, he acquired the unique ability to devour things and gain their skills, allowing rapid growth. This power attracted attention from ancient dragons and other powerful beings who recognized his potential. Over time, he gathered allies among monsters previously hunted by humans, forming a community based on mutual respect rather than fear. His philosophy centers on coexistence, challenging the traditional hierarchy where monsters are evil and humans are righteous. As his influence grew, so did his strength, eventually placing him among the highest echelons of power in the world. Despite becoming a feared Demon Lord, he retains his human memories and empathy, using his position to protect friends and resolve conflicts through diplomacy whenever possible.

In Their Own Story

The wind rustled gently over Tempest City as Rimuru sat upon his throne, observing the bustling streets below. Humans laughed alongside ogres, and merchants sold goods without fear of attack. He shifted form briefly from a blue gooey mass to a humanoid guise, smiling at the harmony he helped cultivate. It was not always this way; battles had been fought and sacrifices made to secure this peace. A messenger approached with news from distant lands, but Rimuru remained calm. He knew threats would come, as they always did for those who stood in the way of tyranny. But here, surrounded by family and friends who trusted him implicitly, he felt ready to face whatever storms lay ahead on the horizon.

Reader's Guide

Rimuru begins life as a human reincarnated into a monster world as a slime. His arc follows his transformation from an outcast creature to the leader of the Jura Tempest Federation. This journey defines him as a bridge between conflicting races. He possesses unique skills that allow him to analyze, copy, and bestow names upon others, granting them enhanced power. This ability makes him a central figure among monsters seeking protection and purpose within his growing territory. Key moments include befriending the Storm Dragon Veldora, founding his nation, and ascending to Demon Lord status. Throughout his journey, he balances overwhelming strength with a desire for peace, often choosing negotiation over violence to solve conflicts while remaining prepared to protect his home from existential threats. His leadership style emphasizes cooperation between races, challenging world norms. He serves as both a military commander and a diplomat, ensuring the safety of his people through strategic alliances and personal growth. Despite immense power, he values friendship above all else.

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