That Time I Got Reincarnated As A Slime Characters

Rimuru Tempest begins his journey as Satoru Mikami, a 37 year old office worker who dies suddenly and reincarnates as a slime in a fantasy world. Instead of despairing, he quickly adapts, discovering unique skills like Predator and Great Sage that allow him to absorb abilities and analyze situations instantly. What truly separates Rimuru from other protagonists is his mindset. He seeks peace before conflict, values cooperation over domination, and believes monsters deserve dignity and safety.

Most Popular Slime Characters Based on 2025 Fan Data

These rankings are based on anime streaming engagement, merchandise sales, fan polls, and online community discussions up to late 2025.

As the story progresses, Rimuru evolves into a Demon Lord and later ascends to godlike status, yet he never loses his approachable personality. He builds the Jura Tempest Federation, a monster nation that welcomes humans, elves, dwarves, and demons alike. By 2026, Rimuru is widely regarded as one of the most well written and balanced protagonists in modern anime.

Rimuru Tempest Key Profile

Great Sage and Raphael The Mind Behind the Power

From the very beginning, Rimuru is guided by a voice in his head known as Great Sage. At first, it functions as an analytical tool that provides information, danger assessments, and strategic recommendations. Over time, this ability evolves into Raphael, gaining autonomy, emotional depth, and independent judgment.

Raphael becomes more than just a skill. It actively manages Rimuru’s abilities, calculates battle outcomes, and even protects him from psychological manipulation. The relationship between Rimuru and Raphael resembles that of partners rather than user and tool. By 2026, Raphael is considered one of the most powerful support intelligences in anime history, shaping not just Rimuru’s growth but the fate of entire nations.

Veldora Tempest The Storm Dragon with a Soft Side

Veldora Tempest is one of the legendary True Dragons, feared across the world for his destructive power. When Rimuru first encounters him, Veldora has been sealed away for centuries, isolated and lonely despite his godlike status. Instead of treating him as a threat, Rimuru offers companionship, conversation, and friendship.

This emotional bond leads to Veldora’s freedom and the birth of the Tempest family name. Despite his fearsome reputation, Veldora is loud, dramatic, playful, and obsessed with manga. Yet in battle, he becomes an unstoppable force of nature. By 2026, Veldora is both one of the strongest beings alive and one of the most entertaining characters in the franchise.

Benimaru The Warrior General of Tempest

Benimaru begins as the leader of an ogre village destroyed by monsters. After meeting Rimuru, he evolves into a Kijin and becomes one of Tempest’s core military commanders. What makes Benimaru stand out is not just his combat strength but his leadership instincts, tactical intelligence, and unwavering loyalty to his people.

He commands Tempest’s armies, leads large scale battles, and represents Rimuru in military diplomacy. Over time, Benimaru transforms from a village protector into a world class general capable of challenging Demon Lord level threats. By 2026, he is widely regarded as Tempest’s strongest frontline warrior and one of Rimuru’s most trusted companions.

Shion The Fierce Secretary with Explosive Power

Shion serves as Rimuru’s personal secretary and bodyguard, known for her overwhelming physical strength and emotionally expressive personality. While her cooking skills remain notoriously dangerous, her loyalty and dedication to Rimuru never waver. She often acts impulsively but always with sincere intentions.

After experiencing devastating losses in battle, Shion matures significantly. These events deepen her resolve and sharpen her discipline, turning her into a more composed and reliable leader without losing her emotional warmth. By 2026, Shion remains one of the most beloved female characters in the series, admired for both her strength and heart.

Shuna The Spiritual and Cultural Core of Tempest

Shuna, Benimaru’s younger sister, plays a quieter but equally important role in the development of the Jura Tempest Federation. She oversees rituals, diplomacy ceremonies, and cultural integration among the many races that settle within Tempest. Her calm demeanor and emotional intelligence help stabilize situations that brute force cannot resolve.

Unlike many support characters, Shuna’s influence extends into governance, religion, and social harmony. She represents Tempest’s moral compass and spiritual foundation. By 2026, fans recognize her as the emotional backbone of the nation, shaping not just policies but the values and traditions that define Tempest society.

Milim Nava The Demon Lord of Chaos and Innocence

Milim Nava is one of the oldest and strongest Demon Lords in existence, daughter of the Dragon King and the hero who once challenged the gods. Despite her overwhelming power, Milim behaves like an energetic child who seeks fun, friendship, and excitement above all else. This contrast between innocence and destruction defines her personality.

Her friendship with Rimuru becomes one of the most entertaining dynamics in the series. While unpredictable, Milim remains fiercely loyal once trust is earned. When serious threats emerge, her playful nature disappears, revealing a terrifying force capable of reshaping reality. By 2026, Milim stands as both a fan favorite and one of the most dangerous beings alive.

Diablo The Elegant Demon Devoted to Rimuru

Diablo is a primordial demon whose intelligence, composure, and terrifying strength make him one of the most respected figures in Tempest. After witnessing Rimuru’s power and leadership, Diablo voluntarily pledges his loyalty, not out of fear but admiration. This devotion defines his identity throughout the series.

Unlike other subordinates, Diablo operates independently, handling espionage, diplomacy, and assassination missions that require both elegance and brutality. His refined speech and unsettling calm presence make him unforgettable. By 2026, Diablo is one of the most popular supporting characters in modern anime and a central pillar of Tempest’s intelligence operations.

Hinata Sakaguchi The Human Who Challenged the Monster King

Hinata Sakaguchi enters the story as one of Rimuru’s deadliest enemies. As a champion of the Holy Church, she believes monsters must be eliminated to protect humanity. Their first confrontation is emotionally charged and nearly fatal, pushing Rimuru to the limits of his abilities and beliefs.

Over time, truths emerge and misunderstandings dissolve, allowing Hinata to evolve from antagonist to uneasy ally. She eventually becomes a key figure in maintaining peace between humans and monsters. By 2026, Hinata represents growth, accountability, and reconciliation, making her one of the most compelling human characters in the series.

Chloe Aubert The Child Who Carried the Weight of Time

Chloe Aubert begins as a quiet, mysterious child summoned from Japan, but her true identity becomes one of the most complex revelations in the series. She is deeply tied to time travel, fate loops, and world altering events that reshape the entire storyline.

Chloe carries centuries of memories and emotional burdens within a childlike body, making her character arc both tragic and profound. Her bond with Rimuru transcends timelines and directly influences major historical outcomes. By 2026, Chloe’s storyline is praised as one of the most emotionally impactful arcs in isekai fiction.

Guy Crimson The Demon Lord Who Maintains Balance

Guy Crimson is one of the oldest Demon Lords and serves as an enforcer of cosmic balance. Unlike villains driven by conquest, Guy exists to eliminate threats that could destabilize the world order. He values strength, responsibility, and equilibrium above all else.

Guy recognizes Rimuru as both a potential ally and a dangerous wildcard, creating a relationship defined by mutual respect and caution. Their interactions influence the political structure of the Demon Lord council and global stability. By 2026, Guy stands as one of the most respected and feared authorities in the Tensura universe.

Velzard and Velgrynd The Ice and Flame Dragon Sisters

Velzard and Velgrynd, sisters of Veldora, are two of the most powerful True Dragons in existence. Velzard embodies cold logic and ruthless efficiency, while Velgrynd struggles between loyalty, love, and destiny. Their opposing personalities create intense emotional and political conflicts.

Both dragons shape nations and wars simply through their presence. Their storylines expand the Tensura universe beyond monster politics into divine scale warfare and ancient cosmic balance. By 2026, they remain central figures in the larger mythological structure of the series.

Frequently Asked Questions

Is Rimuru human, monster, or god?

Rimuru begins as a slime monster, evolves into a Demon Lord, and eventually ascends into a godlike existence, placing him beyond standard classification.

Which character is the most popular among fans?

Rimuru consistently ranks first worldwide, followed closely by Diablo and Milim Nava based on fan polls and engagement data.

Are Demon Lords villains in this series?

Not necessarily. Many Demon Lords operate on their own moral frameworks and can be allies, rivals, or neutral forces depending on circumstances.

Does the story focus more on battles or world building?

While battles matter, the series emphasizes diplomacy, governance, alliances, and emotional growth more than constant combat.

That Time I Got Reincarnated as a Slime succeeds not because its characters are powerful, but because they are meaningful. Rimuru’s journey from ordinary human to godlike leader shows that compassion, intelligence, and cooperation can reshape entire worlds. Characters like Diablo, Milim, Benimaru, and Veldora deepen this narrative by embodying loyalty, chaos, honor, and friendship in unforgettable ways.