That Time I Got Reincarnated As a Slime is a popular Japanese light novel series authored by Fuse and illustrated by MitzVah. The narrative follows the story of Satoru Mikami, a regular salaryman who is reborn as a powerful slime monster that goes by the name Rimuru Tempest.
He has several interactions with the strongest demon lords as allies and foes. The demon lords play a pivotal role in the plot, presenting significant challenges that Rimuru must conquer in his pursuit of peace and progress.
Strongest Demon Lords Ranked According To Their Skills
This article will provide a list of the top ten strongest Demon Lords in the anime.
Ramiris
Ramiris is a friendly fairy, despite being one of the strongest demon lords. She belongs to the first generation of demon lords and is one of the Eight-Star Demon Lords responsible for maintaining balance in the world and capable of terraforming it.
Ramiris is also known as the leader of the heroes, who receive divine protection from her. She possesses an ultimate skill called Labyrinth Creation that renders her invincible. However, Ramiris’ mana capacity limits her power, and she requires Veldora’s assistance to perform extraordinary feats.
Dino
Dino, also known as the Sleeping Ruler, is close to Ramiris. During the Walpurgis event, he spends most of his time sleeping and only wakes up if something truly interesting occurs. Although he frequently teases Ramiris, he does so with a straight face.
Dino is a Fallen Angel who presently holds the sixth seat of the Octagram as one of the strongest Demon Lords. His ultimate skill, Sky King Luciel, became Fallen King Luciel after his fall from grace.
Furthermore, Dino possesses two ultimate skills since acquiring the Slothful King Belphegor skill. His sloth ability allows him to steal the abilities of his targets and make them obedient to him.
Ruminas Valentine
Ruminas Valentine, an authentic Demon Lord who governs the Holy Empire Ruberios and all vampires in TenSura, posed as a maid to expose the mole in the Walpurgis event. Eventually, she revealed her true identity and rightfully assumed her position.
Ruminas appears to be a strict and uncomplicated person who favors sticking to plans. She commands the domains of life and death, assisted by her ultimate skill, Lustful King Asmodeus.
Additionally, she possesses abilities such as nullification, soul manipulation, and resurrection magic, which she utilized to separate the Vampire “Valentin” into separate entities with a distinct consciousness. Ruminas is an immensely powerful demon who even engaged in a battle with Tempest the dragon.
Leon Cromwell
Leon Cromwell is a former hero and one of the primary antagonists in the anime/manga series Tensei Shitara Slime Datta Ken. He is highly skilled in combat and possesses immense magical power, earning him the title of “Hero of the Holy Kingdom.” However, he is also highly arrogant and views himself as superior to others, including the demon lords. Leon is an advocate for the complete eradication of demons, which puts him at odds with Rimuru and the other characters. Despite his initial appearance as a straightforward villain, his motivations and backstory are later revealed, making him a more complex character. He is a formidable opponent and a crucial figure in the series’ overarching conflict.
Diablo
Diablo, who goes by the name Noir, holds a significant role in the anime serving as Second Secretary to Rimuru Tempest and being recognized as one of the Seven Primordial Demons.
Diablo is unquestionably Rimuru’s most powerful servant and is capable of both strong magic and lethal close combat. However, viewers have only had a brief look at his powers thus far.
The battle between Diablo and Razen was brief but intense. Razen hurls strong spells, leveled spirits, and devastating fists at Diablo, yet Diablo easily parries them all. Fans are already hopeful that Diablo will have more chances to demonstrate his prowess.
Dagrule
Dagruel, a demon lord hailing from the race of giants, occupies the fourth seat of the Octagram. His jurisdiction covers the barren lands of the Western region of the Central Continent, earning him the moniker “Continent’s Wrath”.
Initially, Dagruel guarded Heaven’s Gates before joining the demon lord’s second generation. Despite possessing holy power in his body, he initially rejected the Demon Lord Seed.
However, upon the removal of giants and fairies by the Demon Lord, he awakened as a true demon lord. Given his increased power due to anger as a Giant, Dagrule is not someone to provoke. He has concealment and destructive abilities and his only weakness is the lack of an ultimate skill, which prevents him from ranking higher.
Veldora Tempest
Storm Dragon Veldora is the driving force of the series. As one of the four True Dragons, he is considered the strongest type of monster in the world. Before his encounter with Rimuru, Veldora was sealed by a hero, but upon his release, he gained the ability to possess Rimuru’s clones and original body.
After reading the manga, he improved his fighting style and analytical skills, focusing less on magical powers. He played a crucial role in protecting the Jura Forest, as his mere presence was enough to keep many monsters at bay.
Rimuru Tempest
Rimuru Tempest, previously known as Satoru Mikami, is the central character in the anime. He is the partner and best friend of True Dragon Veldora Tempest and the ruler and creator of the Jura Tempest Federation located in the Jura Forest.
With his ability to surpass Veldanava, he is considered a god-level entity, and his transformation into a demon slime has further amplified his powers. He has the abilities of predation and spatial domination, which allows him to consume anything and gain the skills of the object.
Moreover, his Great Sage assists him by analyzing everything for him. Despite having such immense powers, Rimuru Tempest’s charismatic and entertaining personality keeps the audience engaged throughout the series.
Milim Nava
Milim Nava, also known as the Destroyer, is one of the oldest and strongest Demon Lords, with a Catastrophe threat level. She inherited her father’s powers as the daughter of Lucia and True dragon Veldanava.
Milim holds a Special S Rank Ca, catastrophe-class ranking, and is regarded as the world’s most powerful being. Her Wrathful King Satanael ability, coupled with her vast reserves of Magicules, makes her nearly invincible.
Although Milim’s combat style is straightforward, it is incredibly destructive, and she possesses almost unlimited strength and speed. Additionally, she has the Drago Buster move and can transform it into her final form, which grants her wings and claws. Despite her immense power, she is an easygoing individual who seeks to alleviate her boredom.
Guy Crimson
Guy Crimson, who also goes by Rouge, holds the title of the oldest Primordial and serves as the first seat of the Octagram. His immense strength makes him one of the strongest demon lords, having effortlessly defeated Leon Cromwell, the True Dragon and left Milim Nava in a seemingly immobile state.
He is also a highly skilled swordsman with the ability to burn through multiple layers of barriers. Although Rimuru has only witnessed a fraction of Guy’s capabilities, it’s clear that Guy is among the most formidable characters.
Given his exceptional skills and talents, he is the only character who could potentially stand against Rimuru in the final stages of the series.
Those were some of the strongest demon lords, revered by the populace for their strength. Make sure to share this list with your fellow tensura fans.