Rimuru

Biodata

Name	Rimuru (利姆露)
Alias(es)	Lord Rimuru; Alliance Leader; King of Monsters 125 128
Species/Race	Slime; later a Demon Lord 125 144
Gender	Female (current form) 127 144
Affiliation	Jura Tempest Federation
Occupation/Role	Founder and ruler of the Jura Tempest Federation; leader of the Jura Forest Great Alliance 125 128
Status	Active 199
First Appearance	Chapter 125

Power Progression

Stage / Realm / Level	Chapter	Notes
Demon Lord evolution selected	127	Great Sage identifies becoming a Demon Lord as the sole viable route to restore the fallen; the condition is the sacrifice of 20,000 life energies.
True Demon Lord	129	Uses God's Wrath to kill 20,000 Farmus soldiers and absorb their souls, then falls asleep to recover from the evolution. She also summons Diablo and two lesser demons.
Demon Lord advancement	144	A later advancement is explicitly completed in the Federation plaza; Rimuru emerges in a more mature humanoid body and states that her power has increased.

Background / History

Before reincarnating, Rimuru was a male office worker named Satoru Mikami. In her current world, she appeared as a slime and became the figure who united the previously hostile monster races of the Great Forest of Jura. 125 127

Rimuru discovered that granting monsters names allowed them to evolve into more intelligent, humanoid forms. Through this practice and a series of unifying events, she established the Jura Forest Great Alliance and later the Jura Tempest Federation. 125

Her early rule was marked by kindness and a belief in peaceful coexistence, but hostile human kingdoms and demon forces viewed her efforts to civilize monsters as a threat. 125

Appearance

Rimuru can assume both slime and humanoid forms. Before her later advancement, her humanoid appearance resembled a blue-haired girl around twelve or thirteen years old; afterward, she appeared closer to fourteen or fifteen, with waist-length blue hair. 127 144

• Blue hair and a prominent ahoge. 127 145
• Can revert to a small slime form. 147
• Developed a more mature humanoid body during her later Demon Lord advancement. 144
• Wore a white robe immediately after emerging from her advancement. 144

Personality

Rimuru is initially kind, optimistic, and trusting, to the point that she underestimates the malice of human nations. The devastation of the Federation changes her outlook: she concludes that kindness must not be mistaken for weakness and resolves to punish invaders. 125 127

Despite ordering the Farmus counterattack, she insists that civilians must not be harmed, distinguishing justice from indiscriminate revenge. 128

She is an attentive and cautious ruler during crises, personally organizing defenses against the Eastern Empire and coordinating Demon Lords during the divine-space impacts. 153 160 Outside emergencies, she is food-loving, easily distracted by domestic chaos, and openly complains about administrative work. 146 168

Abilities & Skills

Great Sage / Wisdom King

Rimuru's analytical skill evolves from Great Sage into Wisdom King, allowing her to process combat data, assess threats, calculate magical procedures, and develop powers for others. 127 147

• Identified Demon Lord evolution as the only available means to resurrect the Federation's fallen. 127
• Calculated a 91% success rate for Veldora's revival and determined that a clone vessel was required. 148
• Extracted and adapted Veldora's thought-form into a stable vessel during the revival ritual. 149
• Analyzed Satoru Gojo's Cursed Energy, Infinity Technique, combat weaknesses, and potential path toward Unique Skills. 168 170 171
• Helped construct the theoretical model for a two-way channel between worlds. 161

Demon Lord Powers

Rimuru's ascension significantly increases her magicule reserves, physical presence, and access to advanced skills. 129 144

• God's Wrath — Creates countless water spheres and drops that strike targets simultaneously; used to instantly kill 20,000 Farmus soldiers for her evolution. 128 129
• Heartless — Acquired after the Farmus battle; allows control over the souls of people who beg for mercy or help. 129
• Invincible — A passive skill that protects her from physical damage, though powerful impacts can still disorient her. 147 160
• Unscathed — Previously rendered ordinary physical damage ineffective; Hinata's spiritual attacks bypassed this protection. 126
• Dragon Wings — Manifested during the Farmus operation, allowing aerial combat and projection of powerful magical beams. 128

Magic, Barriers, and Sealing

Rimuru is a capable spatial and barrier mage, using magic for rapid deployment, city defense, imprisonment, and interworld travel. 127 154 156

• Teleports herself and allies through hexagonal magic circles. 127 128
• Created a golden barrier over the Federation plaza to block Esdeath's Ice Cones before they could endanger a resurrection ceremony. 145
• Modified and deployed Infinite Prison to restrain Velgrenda's dragon form with tens of thousands of chains. 154
• Constructed a portal using the space-manipulating Imperial Arms Shangri-La as a coordinate anchor; its initial duration was limited to three hours. 156
• Maintained an Absolute Defense magicule barrier while helping other Demon Lords resist impacts from collapsing divine space. 160

Summoning and Revival

Rimuru can use souls and magicules for high-level summoning and spiritual restoration. 129 149

• Summoned Diablo, the Primordial Black, alongside two lesser demons after her True Demon Lord evolution. 129
• Revived Veldora by creating a clone vessel and transferring his extracted thought-form into it. 148 149

Relationships

• Chen Tian / Nero — An idol from Rimuru's former world who becomes a powerful ally and trusted collaborator. Nero saves her from Hinata, supports her retaliation against Farmus, and later works with her on Veldora's revival and interworld travel. 126 128 148 161
• Veldora Tempest — The Storm Dragon whose spirit remained within Rimuru after being absorbed. Rimuru takes responsibility for reviving him and succeeds with Wisdom King's assistance. 148 149
• Shion — Loyal subordinate who helps defend the Federation, supports Rimuru's rule, and acts on her orders during emergencies. 126 146
• Shuna — Trusted attendant who tends the wounded, receives Rimuru during her evolution sleep, and helps manage the Federation's domestic affairs. 126 129 146
• Benimaru — Military commander entrusted with leading the Federation's forces during the Farmus counterattack and Eastern Empire crisis. 128 153
• Luminas — Initially tense ally who protects the Federation while Rimuru is unconscious; the two later agree to an alliance between the Holy Empire and the Monster Federation. 134 146 149
• Satoru Gojo — Nero's friend whom Rimuru evaluates, trains, and assists in awakening Unique Skills. 168 170 171
• The Demon Lords and Dragon Kind — Allies who assist Rimuru in defending their continent and establishing the bidirectional interworld magic circle. 160 161 162

Story Role / Major Arcs

Farmus Invasion and Demon Lord Evolution

While Rimuru is away, Farmus attacks the Jura Tempest Federation under a barrier, leaving many Named Monsters injured or dead. Nero saves the Federation from the invading transmigrators, but Rimuru returns to a devastated city and abandons her earlier hesitation toward retaliation. 125 127

Rimuru orders the counterattack on Farmus with two explicit limits: dismantle its military strength, arrest the invasion's ringleaders, and spare civilians. 128 After Nero immobilizes nearly 20,000 soldiers, Rimuru uses God's Wrath, sacrifices their souls, and advances to True Demon Lord. 128 129

Veldora's Revival and the Eastern Empire

After her advancement, Rimuru joins Nero in reviving Veldora, calculating the procedure and providing a clone body for his spirit. 148 149

When the Eastern Empire mobilizes against the Federation, Rimuru places the nation on maximum alert, directs its defenses, and later uses a modified Infinite Prison to contain Velgrenda's dragon form. 149 153 154

Divine-Space Disaster

Rimuru helps organize the Demon Lords' response when fragments of divine space threaten the continent. She contributes magicules to a large defensive circle, deploys Absolute Defense when it fails, and survives the ensuing shockwave. 160

Interworld Channel

When Nero prepares to return to his original world, Rimuru refuses to abandon the Federation but proposes a two-way channel instead. She gathers Demon Lords and Dragon Kind to help construct the magic circle, enabling continued travel between worlds. 161 162

Gojo's Training

Rimuru receives Satoru Gojo through the bidirectional circle at Nero's request. She analyzes his Cursed Energy and Infinity Technique, identifies his stamina and preparation weaknesses, arranges Ramiris's training, and develops a ritual intended to awaken his Unique Skills. 168 170 171

Notable Quotes

“Our kindness shouldn't be a reason for us to be slaughtered!”
— Rimuru 127

“But remember – do not harm any civilians! We are not vengeful beasts, but warriors seeking justice!”
— Rimuru 128

Trivia

• Rimuru was a fan of Nero before reincarnation and immediately recognizes him when he intervenes against Hinata. 126 127
• She enjoys grilled meat, cake, and chocolate. 146
• Rimuru openly wishes she could avoid administrative work and “be a happy slacker.” 168
• Her ahoge visibly reacts to surprise, urgency, and emotional distress. 127 149