How Old Is Rimuru Tempest, but Not in Death Note

If you've landed here wondering "how old is Rimuru Tempest in Death Note," you're not alone! It's a common mix-up, but let's clear the air right away: Rimuru Tempest, the beloved protagonist, is actually the star of the hit series That Time I Got Reincarnated as a Slime (also known as Tensei shitara Slime Datta Ken). He has no connection whatsoever to the world of Death Note.
Now that we've set the record straight, prepare to dive deep into the fascinating world of Rimuru Tempest. His "age" is far more complex than a simple number, reflecting a journey of reincarnation, exponential growth, and profound transformation. This flagship Super Pillar hub is your ultimate guide, connecting you to every intricate detail of his existence, from his past life as a human to his current role as the powerful, compassionate ruler of the Jura Tempest Federation.

Setting the Record Straight: Rimuru's True Origin

It's easy to get anime protagonists mixed up, especially with so many incredible series out there. However, Rimuru Tempest's story begins not with a Shinigami's notebook, but with a tragic, yet ultimately transformative, accident in modern Japan. He's a blue slime, a powerful monster, and the benevolent leader of a burgeoning nation, all born from the most unexpected circumstances.
Before we dive deeper, it’s crucial to understand why any connection to Death Note is a common misconception. Rimuru's narrative is entirely separate, rooted in a vibrant fantasy world brimming with magic, monsters, and intricate politics, rather than the psychological thriller of Light Yagami. For a complete picture of his fascinating journey from human to slime, consider exploring the foundational elements of his story and . This guide will walk you through his humble beginnings as Satoru Mikami and his rebirth into a new, magical world.

Unraveling Rimuru's Age: More Than Just Numbers

The question of "how old is Rimuru Tempest" is intriguing because it has multiple answers, none of which truly define his maturity or power. In his past human life as Satoru Mikami, he was 37 years old when he met his untimely end. Following his reincarnation as a slime, his chronological age extends to 39 years, accounting for his time as a monster.
However, physically, Rimuru often takes on a form that appears much younger, leading to speculation that he might be around 14 or 17-18 years old. What truly matters isn't a fixed number, but his exponential growth in power, wisdom, and experience. His age is a mere footnote compared to the rapid development of his abilities and his profound impact on the world around him. To fully grasp the intricate timeline of Rimuru's existence, from his human life to his current reign, and the periods of accelerated learning that shape his incredible journey.

Beyond Age: The Distinctive Form and Identity of Rimuru

Rimuru Tempest's existence challenges conventional notions of identity. As a slime, he is inherently genderless, capable of replicating various forms. Despite this, he self-identifies as male, a nod to his past human self. His iconic appearance features striking Light Steel Blue hair and piercing golden eyes, often seen in a humanoid form that belies his true nature as a sentient, immensely powerful slime.
His re-birth date, February 20th, makes him a Pisces, a detail that subtly reflects his adaptable, compassionate, yet sometimes indecisive personality. This unique blend of physical neutrality and chosen identity is a cornerstone of his character, allowing him to connect with diverse individuals across his growing nation. Delve deeper into how , revealing how he navigates a world that often relies on such distinctions.

The Evolving Heart of a Slime: Rimuru's Personality and Leadership

Despite his monstrous form, Rimuru possesses a profoundly human heart, albeit one that evolves throughout his journey. He is characterized by a blend of mature wisdom and endearing childishness, often displaying kindness, diligence, and remarkable intelligence. His diplomatic prowess is a key strength, allowing him to navigate complex political landscapes and avoid conflicts whenever possible.
However, Rimuru is not without his flaws. He experiences anxiety, self-doubt, and often struggles to refuse requests for help, sometimes to his own detriment. Yet, when his loved ones are threatened, a formidable and chillingly unsympathetic side emerges, showcasing the true power and protective instincts of a monster lord. Over time, he adapts to his new existence, becoming more detached from his human past while retaining the fundamental compassion that defines him. Understanding the nuances of his character, from his initial anxieties to his unwavering resolve, is key to appreciating .

The Architect of a New World: Rimuru's Role and Power

Rimuru Tempest isn't just a protagonist; he's the visionary founder and benevolent King of the Jura Tempest Federation, a rapidly growing nation of monsters and various races. Residing in the bustling capital of Rimuru City, he is renowned across the land as the "Tempest of the Great Jura Forest," a title signifying his immense power and influence. His leadership isn't just about strength; it's about fostering cooperation, understanding, and mutual respect among disparate groups.
From his initial reincarnation, Rimuru's unique abilities as a slime, including his "Great Sage" and "Predator" skills, rapidly transform him into one of the most formidable beings in his world. His power is not merely destructive but also creative, enabling him to build a thriving society where peace and progress are paramount. For an in-depth analysis of the incredible powers and unique abilities that make him an unstoppable force, . Witness firsthand how his visionary leadership transformed a collection of monsters into a thriving nation, by examining from its humble beginnings to its current prominence.


Rimuru Tempest is a character whose depth goes far beyond a simple age or a single anime series. He represents growth, adaptation, and the profound impact of a compassionate leader. We encourage you to delve into each of these pillar guides to fully appreciate the richness of his story and the vibrant world he calls home. His journey is a testament to the idea that true power comes not just from strength, but from wisdom, kindness, and the ability to inspire change.