It's a shame it has no gender

—Benimaru, on Rimuru's transformation

"Flare Lord" Benimaru ["赫怒王"フレアロード 紅丸ベニマル, "Kakudo Ou"F u r e a R o o d o Benimaru, lit. "Scarlet boy"] is a Flame Spirit Oni (炎霊鬼) and a loyal follower of Rimuru Tempest, the King of Tempest.

He is the Commander-in-Chief of Tempest, one of Rimuru's Twelve Patrons and also one of his three strongest subordinates, including Diablo and Zegion.


Benimaru has hair burning like a crimson flame. Two jet-blackhorns protrude from below the hair. Glowing more brilliantly than obsidian. Although he used to be big and bulky, his height decreased to 180 cm, and his body tightened.

Benimaru received a kimono that turned blood red to match his aura.


Benimaru has a carefree personality. His personality is that of an excited and confident man. Although his personality is easily excited, he is actually really cautious and cunning.

Benimaru felt hesitant when faced with the need to take over the Ogre tribe village chief. Thus, he is content with his current position with Rimuru as the Lord he serves. As one of the military commander, he merely wishes to rampage to his heart’s content. Had he become chief, he could not ride off to battle thus. But now was different. He can participate without any concern.

Background Edit

As the young master of the ogre village, Benimaru would have taken up the weight and responsibility of a leader had ten thousand Orcs not invaded his town and slaughtered all but six ogres. 

Escaping the disaster, he runs into Rimuru. With the turn of fate, he pledges his loyalty to Rimuru after witnessing his lord’s benevolence and promise of retribution. 

Plot Edit

Forest Disturbance Arc Edit

Life in the Royal Capital Arc Edit

Birth of a Demon Lord Arc Edit

Saint Demon Confrontation Arc Edit

Founding the Demon Capital Arc Edit

Demon Lords' Gambit Arc Edit

Empire's Invasion Arc Edit

Ryuma Clash ArcEdit


Before being named, Benimaru had the abilities of a B+, with intelligence. After evolving they surpassed A rank.

Benimaru knew nothing except numbers of soldiers when it comes to the art of war. So his appointment was in name only. Later, after much training Benimaru was able to abandone his prideful thoughts. He became able seriously considers abilities of his own forces and that of the enemy and accurately judge fighting strength. He had evidently grown as a fighter and was finally able to become a successful general, proving his abilities during the war between the Eastern Empire and Tempest.


  • Flame spirit magic

Ultimate SkillEdit

Unique SkillsEdit

Extra SkillsEdit

Daily SkillsEdit

  • Universal Perception
  • Demon Lord's Haki
  • Heat Detection
  • Dignity
  • Herculean Strength

Battle SkillsEdit


  • Physical Attack Immunity
  • Natural Elements Immunity
  • Abnormal Status Immunity
  • Mental Attack Resistance
  • Hybrid Attack Resistance


Benimaru received a tachi, forged by Kurobee.

  • Crimson Lotus Edge: Katana with a crimson blade.


Souei Edit

Benimaru and Souei are rivals and best friends. They are also of the same age. Together, they loyally serve under Rimuru Tempest, King of Tempest.

Momiji Edit

After Tempest 1st tournament, Momiji was fascinated with his performance and declares herself as Benimura's fiancee, which flustered him from the sudden declaration. Later on, before he evolves into a Demon Lord, he must leave an offspring for his species to continue, as becoming a Demon Lord make him immortal and render reproduction unnecessary, as such Rimuru has declared that the engagement between Momiji and Benimura has become official to which Benimura doesn't mind at all and now that he has offspring and has complete his evolution in becoming a Demon Lord when means he has married Momiji

Rimuru Tempest Edit

He's loyal to Rimuru and as the Commander-in-Chief of Tempest a position with Rimuru in trusted to him as the military Commander-in-Chief he wishes to executive his Duty to live up to that trust


His younger sister.


His mentor and adviser when he's still in the ogre tribe.



A Rival, not unlike Souei whom he often clashed with in order to gain the favour of Rimuro. During the Tournament Arc Benimaru was able to win over Diablo, which resulted to even more devotion in traing for the latter. In the end Diablo was finally able to surpass him after their evolution to demon lords, which was, altough unwillingly, acknowledged by Benimaru.




Trivia Edit

Major and Minor BattlesEdit

Evolution Edit

Ch. Evolution Stage Trigger for


Rank EP New Skills / Abilities


Ogre B+
27 Oni Named by Rimuru A-
31 Battle Black Lightning



Magical Clothing

37 Battle Hell Flare (Black Flame Prison)

Shapeshifter (weakened)

Extra Area Boundary

Fire Manipulation

72 Eating Shion's


Resistance Poison Resistance
74 Fair Oni Rimuru's Evolution

To True Demon Lord

A 213,000 Unique Generalissimo
Battle Demon Flame Transformation (Fire Transformation)
Extra Multiple Barriers

Spatial Travel

Daily Magic Perception

Heat Detection


Herculean Strength

Resistance Physical Attack Nullification

Pain Nullification

Status Change Nullification

Spirit Attack Resistance

Holy Magic Attack Resistance

Natural Effects Resistance

106 Weapon Katana: Crimson Lotus Edge
114 Battle Rebirth Flame (Intermittent Blast of the Hazy Black Flame)
Extra SwordSkill: Dim Current Slash
17 Flame Spirit Oni Forceful evolution into a Demon Lord by Rimuru SS 1.000.000+ Ultimate Thought Acceleration

Unifying Control

Heat and Light manipulation

Space Manipulation

Multi-layered Barrier