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Rimuru Tempest/Satoru Mikami

King of Jura Tempest/Great Demon Lord
King Slime & Ruler of Monsters
Satoru Mikami 

Rimuru voiced by: Miho Okazaki (Japanese), Brittney Karbowski (English)
Mikami voiced by: Takuma Terashima (Japanese), Jason Liebrecht (English)
Great Sage voiced by: Megumi Toyoguchi (Japanese), Mallorie Rodak (English)

The King of the country of Tempest. Once a human named Satoru Mikami, he was reincarnated into a slime after his death. He is somewhat naïve for a king, and peace loving, but still tries his best to rule as a good king.

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  • 100% Adoration Rating: Creates a nation of various monster species all fiercely loyal and grateful to him. Speaking ill of their lord is a quick way to earn their ire.
  • The Ace: The applications of his Great Sage and Predator skills, whether it be for combative or mundane purposes, are pretty much limitless. One of the first things he accomplishes upon being reborn is create a huge stockpile of healing potions from the plants he's been devouring. They're later revealed to be potent enough to regenerate lost limbs.
  • Achievements in Ignorance: So much so that Storm Dragon Veldora, in his side stories, can't tell if Rimiru is an unparalleled strategic genius, or a total moron.
  • Adaptation Dye-Job: In the original web novel his slime form and hair are white, but the light novel and subsequent adaptations change this to pale blue.
  • Adaptational Attractiveness: Not that he's unattractive in the light novels, but the anime really amps up his human form's cute facial features so that he's far more of a pretty boy.
  • Adaptational Nice Guy: The manga and anime downplays how he doesn't really trust the people he works with and that he isn't really against killing or anything, he just hasn't felt a need to engage in wholesale slaughter. The anime in particular practically makes him an All-Loving Hero who'll extend a helping hand to anyone who asks, even an enemy if they prove willing, though still willing to destroy or absorb anyone who rejects it and keeps trying to hurt his people, as well as noting that his subordinates can often end up twisting his arm to lend aid.
  • Afraid of Their Own Strength: Played for Laughs. After subjecting a monster to his Poisonous Breath, he's disgusted by the outcome and decides to never use that skill again.
    • He's also shocked by how destructive his Black Flame skill is, outright calling it scary when he tests it out in an empty cave. Later, he uses it to project massive flames into the air to intimidate the hostile ogres. When they finally agree to talk things out he reabsorbs the flames stating that he couldn't leave it hanging there or else it might get someone killed.
  • All Men Are Perverts: Though he's at least discreet about it. As he's dying, he tells his junior colleague to throw his hard drive in the bathtub to fry it, not wanting what's on it to be seen by anyone. Episode 6 gives a bit of an idea what was on there when he's showing Shizue his memories and he accidentally reveals (to his horror) there was at least one game on there that had scantily-clad elf girls taking their clothes off as part of it (though Shizue is more amused than anything while commenting on their beauty).
  • All Webbed Up: His Sticky Thread and/or Steel Thread skills from killing a Black Spider can be used to do this.
  • All Your Powers Combined: Can use every ability of his subordinates and many of his enemies' abilities as well.
  • The Assimilator: Gains most of his skills by absorbing the bodies of his enemies with his Predator skill. Later on it evolves into Gluttony where his chance of gaining skills and his range of targets is increased. Gluttony later evolves into Gluttonous King Beelzebub where he is able to absorb everything including the soul of his target for skill gain, and later absorbs other Ultimate Skills to evolve into Void God Azathoth.
  • Aura Vision: He doesn't have eyes in his normal slime form (even if he does make indentions resembling them to reference his shock and surprise), and for the first few months of his reincarnation was actually blind before he gained the Magic Sense skill from Veldora to let him sense the life forces of those around him.
  • Authority Equals Asskicking: The ruler of his nation and the strongest member of it.
  • Awesomeness by Analysis: Not him actually but the Great Sage skill which has an encyclopedic understanding of his own capabilities as a slime and will offer him options and warnings based on his current situation. That said he's still fairly perceptive in his own right.
  • Badass Adorable: Both his slime form and his human form are noted by many characters to be very cute and unassuming. Then you realize that it's basically impossible to hurt him or permanently damage him and that he's got a constantly expanding encyclopedia of dangerous magical spells and skills.
  • Barbie Doll Anatomy: His human form has no genitals. He could modify himself to possess said genitals at will with no trouble at all, but as mentioned below, it would be more trouble than they would be worth anyways.
  • Barrier Warrior: With his Ranged Barrier ability.
  • Benevolent A.I.: Has a magical version in the form of the Great Sage skill. It assists him in all aspects of his life, analyzing his surroundings and offering possible solutions to the problems he encounters. The skill later evolves into the Ultimate Skill Wisdom King Raphael who is affectionately called Raphael-sensei by him. This eventually culminates into Rimuru giving Raphael the name Ciel and allowing her to evolve into a Manas, breaking away from the Ultimate Skill and becoming a second nucleic Heart that dwells in Rimuru's soul.
  • Benevolent Mage Ruler: Ruler of the Kingdom of Tempest and strongest member of the nation.
  • Beware of the Nice Ones: He's a perfectly pleasant and kind person, and as long as you never give him a reason to, you don't have to worry about getting him mad. Which is a good thing, because Rimuru is fully capable of wiping out large, powerful armies with ease on his own, as one country that makes the mistake of attacking Tempest has to find out the hard way.
  • Blob Monster: He's a sentient slime monster, with his body having no solid form and able to reshape at will. Though he later learns to take on human form. Veldora notes early on Rimuru's situation is unique, as slimes are mostly low-ranked monsters incapable of higher thought (a slime capable of rudimentary speech is apparently considered rare enough), and has little issue believing Rimuru's story about his reincarnation as a result.
  • Cannibalism Superpower: One use of his Predator skill is to gain the powers and mimic the appearance of whoever he consumes.
  • Celibate Hero: Though he indeed doesn't have biological sex in his current form, he can easily modify himself to get the attributes back, but in the end (when he finally remembers that) admits that it'd be more hassle than it's worth.
  • Chekhov's Gun: Those curing potions he brewed inside himself in those first months before meeting Veldora. Turns out, due to the dragon's magic power the resources in the cave were incredibly pure and potent, and thanks to the Rimuru's unique skill he was able to utilize them to the full potential, resulting in the vaunted Full Restore potion, able not only to heal any mortal wound but also to regenerate lost limbs. Which is an incredibly valuable resource, and, once Vesta was able to reproduce it, one of Tempest's chief exports. Just as an example, the normal healing potion most adventurers are able to afford is only able to heal light to medium wounds and is usually manufactured by diluting the somewhat weaker Restore potionsnote  10 times.
  • Chekhov's Skill: His past life as a general contractor comes in handy once he starts expanding the goblins' village.
  • Chronic Hero Syndrome: Rimuru admits in his past life he was the type of guy who just couldn't say no to someone in trouble, which motivates a lot of his acts. And whenever he feels doubts about it, his subordinates who fully view him as a saint will unintentionally twist his arm by declaring he'll help others anyways.
  • Clueless Chick Magnet: He doesn't seem to understand that he's very, very popular among women. By the end of the web novel even Milim seems to be joining in out of the blue. Even when he does seem to get it he wonders what the point is given that he has no sex.
  • Color Motif: His natural slime body is a pale blue, but even in his human form he adopts such colors. His hair in his human form matches his Slime body's color and he tends to favor wearing a blue coat.
  • Comically Invincible Hero: Many of his fights are treated as such, where his enemies are unable do even the slightest bit of damage to him while he defeats them in an unexpectedly humiliating fashion due to failing to restrain his power. His first "true" fight with Ifrit has him trying to dodge the monster and he summons' fire attacks, only to realize after being caught off-guard and hit dead-on near the end that he has Fire Resistance and wouldn't have been hurt anyways.
    Rimuru: (to Ifrit) I underestimated you, but not as much as you underestimated me.
  • Complete Immortality: Can't be killed unless the nucleus of his soul is completely destroyed. Later on even that is not enough as he exists within multiple places.
  • Combat Clairvoyance: Can predict the movements of opponents with Future Attack prediction.
  • Confused Question Mark: Often has one forming out of his slime body to show his confusion.
  • Cool Mask: Inherited from Shizue after her death. It's enchanted to mask the wearer's magical aura so if he wears it in human form, he just appears to be a completely normal, powerless teenager to monsters and anyone else capable of sensing magical aura.
  • Cool Teacher: He takes over the Shizu's teaching duties when arriving at Ingracia, and can easily handle the unruly Summons class taught by her, because he was the only ohe who could be actually bothered to listen to the kids, instead of just punching his time.
  • Covert Pervert:
    • On the surface he frowns upon men ogling girls, but secretly he's all too pleased when the girls hug him and press him against their breasts.
    • When he first sees an adventurer use a Stealth Arts skill that obscures himself and his companions from sight, Rimuru's thoughts can be summed up "Imagine the peeping you could do!" and "A disgraceful perv that I absolutely want to make friends with later!"
  • Cuteness Proximity:
    • The Elf girls all squee over how cute he is and hug him tightly, while secretly he's all too delighted at having their breasts pressed against him.
    • This holds true for the Oni girls too, who find him extremely cute and will fight over him.
  • Dark Is Evil: The main reason that he refuses to become a Demon Lord, at first at least. is under the belief that he will turn evil once he becomes one, due to the association of the title Demon Lord with Evil. It gets deconstructed as, after he becomes one out of necessity, Rimuru is still the same kindhearted and selfless being he was before.
  • Dark Is Not Evil: He has dark flames, demonic wings, became a demon lord, and wears a black outfit later in the series, but is still a noble-hearted hero.
  • Demon Lords and Archdevils: After some time he awakens as a True Demon Lord and later becomes a Great Demon Lord later on.
  • Distracted by the Sexy: Briefly gets distracted by the sight of Shion's respectable cleavage during the battle with the ogres. Shion is too slow to take advantage of it since she's just as confused when he yells out "Huge!"
  • Does Not Know His Own Strength: It takes him a while to realize just how strong he is compared to normal folk and monsters due to how much time he spent in isolation for the first few months of his new life just eating things in his cave and gaining new abilities with his Predator skill. When he actually gets out and sees a bunch of scared goblins, his attempt to greet them first goes wrong because he tried out his newly-regained ability to speak at Make Me Wanna Shout levels that shake trees with gale force. It takes him a few seconds for him to realize he's the incredibly powerful monster they've sensed and is freaked out when he uses his Aura Vision on himself and sees the vast net of energy he's been unknowingly putting out.
  • Doppelgänger Attack: Aside from fire powers, he also gained Ifrit's Doppelganger skill after devouring him. He uses this to create a clone to look at his own looks like a mirror, and turn it into a slime to be rested on like a cushion while he is in human form.
  • Dude Looks Like a Lady: His human form is incredibly pretty-looking, which is due to the fact it came from eating Shizue, who asked him to do it as she was dying. So essentially, he's a genderless slime who identifies as male due to his past life and mimics a human form based off a woman. It's to the point that in Tempest, he's considered one of their three major idols alongside Shuna and Shion.
  • Eating Optional: His slime form doesn't need to eat for sustenance. Though as a former human he still likes to indulge in it after he got his sense of taste back.
  • Elemental Powers: Has several of them that he gains on his journey and gets later the complete set with law manipulation after evolving into an Ultimate Slime.
  • Elemental Shapeshifter: Can shapeshift parts of his body into fire after absorbing Ifrit.
  • Emotions vs. Stoicism: The problem with the ego sprouted within Raphael. While it was originally made of pure reason it slowly gained emotions through interaction with Rimuru. Side effects of it were that its perfect calculations were disrupted through newfound anxiety but also allowed it to search more efficiently for solutions to problems.
  • Feel No Pain: His Pain Nullification skill ensures that he won't feel pain from attacks, though it doesn't stop him from being damaged, nor does it stop pain from soul damage. Luckily, his Self-Regeneration skill as a slime makes up for it.
  • Fetish: Has a thing for Elf girls, even having the image of one as the wallpaper of his computer in his previous life. When he is in Dwargon, he is excited to be in a brothel full with Elf girls.
  • Flash Step: During his initial encounter with the ogres, he's quick enough to pretty much vanish from one spot and appear in front of another in the blink of an eye. He also perfectly dodges the Orc Disaster's Chaos Eater with this.
  • Forgot About His Powers: After using his human shapeshifting ability for the first time he seems to forget that he can alter it to be more masculine or feminine, including growing sexual characteristics. In one of the last chapters of the web novel where he seems to have finally realized/addressed his harem of beautiful monster girls (and Chloe) he thinks that it's pointless because his body is neither male nor female. But it could be. If he remembered.
  • Freudian Slip: When he learns there are elves in the Dwarven Kingdom, he keeps slipping up and expressing his desire to meet them firsthand before hastily stating he's referring to the dwarves and other beings there.
  • Gameplay Automation: His "Auto Battle Mode" amounts to a rare non-video game example of this with shades of Split-Personality Team. In order to take full advantages of his combat capabilities against the Orc Lord, Rimuru can hand over control of his body to Great Sage, who understands Rimuru's own abilities better than he himself does.
  • Genre Savvy: Rimuru was a gamer in his human life and often calls out tropes when he notices them, recognizing Lethal Chef based on Benimaru and Hakurou's reactions to learning that Shion was going to cook for Rimuru.
    Rimuru: Why, trope, why?!
    • More broadly, from the early points of the story he is able to make generalizations about the fantasy world that let him read into ongoing situations even without knowing specifically what's going on.
  • Giver of Lame Names: He says several times that he's not great at naming. While he does give a few good Meaningful Names, he has to name so many people that he runs out of good ones quickly. Most of the goblins have some variant of "Gob__," and the thousands of orcs got little more than a color and a number.
  • Good Is Not Soft:
    • A big part of the reason Rimuru has earned his people's loyalty, respect and love is because he is a genuine Nice Guy who'll extend a helping hand without hesitation. Even if you come at him at an enemy he'll forgive you if it was a misunderstanding or you apologize (after roughing you up a bit). But if you refuse his mercy or, God forbid, kill his subjects, he will end you without hesitation.
    • An extra chapter of the manga demonstrates this While killing off the army from the Farmus Kingdom that aimed to attack Tempest, he comes across an injured soldier. Said soldier, who was a guy that was genuinely just out of duty and even felt regret at what he would be forced to do, pleaded him to spare his children's lives. Rimuru calmly reassured him that no harm would come to his kids, right before killing said soldier. Rimuru knew that the man he had just killed was not evil, simply an average soldier, but he was going to attack his nation nonetheless and had to die.
  • Gravity Master: Gains this skill after devouring the core of Charybdis.
  • Head Bob: As he lacks a face aside from two lines for his 'eyes', he typically bobs his whole body around to while conversing to convey his emotion.
  • Healing Potion: He can generate a highly potent elixir capable of even regenerating lost limbs because he's gorged himself on the ingredients necessary to create it while lost in the first cave.
  • Heroic Sacrifice: Satoru died protecting his friend from a knife-wielding maniac.
  • Human Sacrifice: Devours more than 10000 souls for his evolution into a True Demon Lord.
  • Instant Armor: Can coat any part of his body in Armorsaurus scales rendering it hard enough to shatter an ogre's sword.
  • Intergenerational Friendship: With a LOT of characters, since both his slime age (3 at the current point in the story) or his real human age (40) make him much younger than many of his friends, both magical and mundane. Veldora and Milim are prime examples, being among the most ancient beings in that world.
  • Invincible Hero: Starts as one, though this gets quickly subverted, because while the world he gets reincarnated into strongly resembles Dragon Quest, he "plays" it not as an RPG, but as a 4X game. Which both means that, first, being ridiculously overpowered is only expected, and, second, he quickly gets matched with the equally OP peers and opponents.
  • It's All My Fault: After returning to Tempest and seeing countless of his followers dead, including Shion and Gobuzo, due to an attack by the Kingdom of Farmus, Rimuru starts to blame himself because he wasn't there to prevent this disaster and because his subordinates obeyed his orders of not killing humans, even if said humans were enemies. Luckily none of his surviving followers blame him for this.
  • Killer Rabbit: Even as Rimuru gains more and more power, his slime form remains a mostly small blob and even his human form at most only resembles a very young adult once he becomes a True Demon Lord with it often being mistaken for much younger. Veldora also notes that slimes as a rule are low-ranking unthinking monsters. This causes pretty much everyone who doesn't know about his power to underestimate him and think he's just a push-over, when in reality he can slaughter armies of high-ranked opponents on his lonesome.
  • Level Grinding: An unintentional example. While lost in the first cave he tested his own skills and with the help of the Great Sage skill evolved combative techniques to deal with the dangerous monsters. After slaying them he used his Predator Skill to absorb them, bolstering his physical and magical strength as well as gaining new skills to be analyzed and experimented with. Apparently this went on for weeks and by the time he finally got out of the cave he was one of the most powerful beings in Jura Forest.
  • Luxury Prison Suite: As Veldora can attest, the dimensional space within Rimuru's Predator is far better than any other prison experienced, with the prisoners permitted to conjure anything while incarcerated within him for their comfort. The only real issue is the boredom that comes when there are no cellmates to share it with... at least until Rimuru eats Ifrit.
  • Making a Splash: Gained water manipulation skills after absorbing the water of a lake and infusing it with mana to use it as a projectile.
  • Make Me Wanna Shout: Gained from devouring a giant bat monster, he uses it to speak.
  • Matter Replicator: He's basically a living one as his Predator skill allows him to consume, analyze and reproduce practically anything. This is demonstrated when he refines magical ore into pure magisteel and healing herbs into highly powerful healing potions but illustrated the best when he consumes Kaijin's high-quality magical blade and produces twenty copies on the spot.
  • Marshmallow Hell: Upon meeting a group of elf girls, they all hug and squeeze him tightly, pressing him against their big breasts. Though it's anything but hell for him, in fact by his own admission he's in heaven.
  • Martial Pacifist: Often tries to find a peaceful resolution to every conflict but is willing to resort to lethal violence if the situation calls for it.
  • Meaningful Rename: He reincarnates into the new world without a proper name, effectively ditching "Satoru Mikami" in the process. He's eventually given the name Rimuru by Veldora, a definitely non-human sounding name compared to his normal former name. Then, he gets the surname of Tempest, which is quite fitting for how his arrival in the new world causes quite a shake-up.
  • Min-Maxing: Done entirely by accident during his reincarnation. The skills he inadvertently chose make a perfect combination with his status as a slime for endless growth into a nigh unstoppable opponent that gets stronger with each unique opponent he defeats.

  • New Life in Another World Bonus: Rimiru Tempest has Predator, allowing him to be The Assimilator, Great Sage which is basically a super computer and Pain Nullification to nullify pain. And he is a Slime, so he can regenerate his body. All were acquired when the world interpreted his dying wish as him desiring these abilities.
  • Nice Guy: Rimuru, be it as a human willing to take a fatal stab wound for his friend or a slime willing to extend the hand of friendship to a dragon or become a savior to a goblin village, is a really nice guy. Which is a good thing too, because with his powers he's an unstoppable juggernaut when he gets going.
  • No Biological Sex: Being a slime makes him genderless since slimes don't reproduce sexually and even in human form he has no sex characteristics. He notes that he could develop such organs if he truly desired it but thinks it would be a waste of time. He briefly makes a feminine body to see if he can, but almost immediately dismisses it as being immoral, bearing too close a resemblance to Shizue. He still has a very obvious predilection for women, however, as shown by his excitement at meeting and being pampered by a bunch of buxom elves.
  • Now You Tell Me: Great Sage tends to tell Rimuru certain information until after he's already done the specific action.
  • Ore Onna: Invoked. Several characters note with amusement that it's a little odd for such a little girl to talk like some middle-aged guy since they don't realize he isn't a girl.
  • Outside-Context Problem: Rimuru is this for a lot of movers and shakers of this world, and he's been a Spanner in the Works for a lot of plots and conspiracies, what with his ridiculously owerpowered skill set and power from the start.
  • The Paralyzer: Has Paralysis Breath from devouring an Evil Centipede.
  • Partial Transformation: Shown altering both his slime and his human form with the attributes of the many monsters he's devoured i.e. Adding bat wings to both forms or coating his arm in scales hard enough to withstand and outright shatter a sword.
  • Perpetual-Motion Monster: Figures out early on that his new slime body doesn't need to eat, sleep or breathe. Of course, he's happy to indulge in all these things with gusto.
  • Physical God: Evolving into a spiritual lifeform made him into one. After surpassing Veldora he even becomes the source of divine protection for his country and his citizens.
  • Playing with Fire: Gained fire manipulation abilities after devouring Ifrit.
  • Please Kill Me: Before going on his way to gain the number of souls necessary to become a Demon Lord, he pleads Benimaru to kill him if he turns into a monster after the ritual is complete. Benimaru accepts, but he convinces Rimuru that this will only occur if they can prove that Rimuru is no longer himself.
  • Poisonous Person: After absorbing a Black Serpent, he gains the skill Poisonous Breath. It's powerful enough to reduce another large monster to toxic sludge.
  • Pop-Cultured Badass: As a result of having been an otaku in his past life, Rimuru is well-versed in video-games and manga, and likes quoting Dragon Quest's "I'm not a bad slime!" line as a way of finding fellow World-Travellers.
  • Power Copying:
    • By devouring magic spells, he can analyze them and use them even better than the original users, such as when he eats Ellen's Icicle Lance and upgrades it to Icicle Shotgun.
    • Later on, he gains the ability to use any skill his subordinates learn, even if he didn't grant them it. However, he doesn't gain the experience to use it and has to train it on his own, and it only applies to skills. Magic and knowledge are not transferable.
  • Power of the Void: Gained that ability after attaining the Ultimate Skill Void God Azathoth.
  • Power Perversion Potential: Attempted and ultimately defied. At one point he uses his new Doppelganger skill from Ifrit to make a copy of his new human form and uses magic to make it look more like an adult woman. He's ecstatic for about a split second before he's very quickly filled with shame and sorrow when he realizes the clone now resembles the recently-deceased Shizue and turns it back into a slime.
  • Pragmatic Hero: He saves and otherwise helps practically everyone he meets, not out of altruism (in most cases), but because he wants to forge connections that will make his nation stronger.
  • Pro-Human Transhuman: Despite no longer being human after his reincarnation, Rimuru still has a soft spot for his original species, with even the very first rule he has for his monster followers and subjects being to never attack humans. That's not to say he isn't blind to humans attacking his people unprovoked, however, as he's fine with them fighting back in self-defense.
  • Razor Floss: His Steel Thread skill can be used to this effect, as Ranga's father running into them not only restricted his movement, but also injured him to an extent.
  • Reincarnation
    • Although he was once a human, he reincarnated into a slime after being stabbed to death.
    • The ending implies that he's a reincarnation of Veldanava, though it leaves it ambiguous. And if it is true it doesn't seem to stop Milim from wanting to hook up with him.
  • Red Eyes, Take Warning: His eyes turn red when he hands control over to his Great Sage, giving him a form of Perfect-Play A.I.. He even lampshades this trope later in the anime:
    Rimuru: The shady character's eyes always glow red.
  • Remembered I Could Fly: As he prepares to die a second time, he wonders why Ifrit's flames aren't burning him to death then Great Sage chimes in that he has the Fire Resistance ability.
  • Seven Deadly Sins: Wields the Ultimate Skill Gluttonous King Beelzebub.
  • Seven Heavenly Virtues: Wields the Ultimate Skill Wisdom King Raphael and Covenant King Uriel.
  • Shapeshifter Default Form: He's a small slime in his true form and warns people not to assume his human form is what he truly looks like. It's also used in another way: While he showed the ability to modify his shape in human form to make it older or change how masculine/feminine it is, when he first starts using said form he has the appearance of a young girl. Eating the Orc Disaster makes him appear slightly taller and older.
  • Shapeshifter Baggage: Has no problems taking forms that use less of his body mass but need to substitute parts with mana when taking forms with more biomass than he originally has, usually slowing his reaction speed with it.
  • Shapeshifting: Can take the form of every creature he devoured. Most come from eating fallen enemies but his human form was gained after eating the dying Shizue, who asked him to do so as her dying wish.
  • Shock and Awe: Gained lightning powers after fusing water manipulation and fire manipulation skills into particle manipulation.
  • The Sleepless: A slime's cells can have any function. Different cells are continually rotated as brain cells meaning that slimes don't have to sleep.
  • Soul Power: Can manipulate souls through Arcane Magic.
  • Space Master: Gains this ability after attaining the Infinity Prison Skill and evolving it to the Ultimate Skill Covenant King Uriel.
  • Stock Light-Novel Hero: A pretty ridiculous take on this trope. Rimuru was once an ordinary human who died and got reincarnated in another world that was magical. The twist however is he got reincarnated, as the title suggests, as a slime. He discovers that the nature of his reincarnation granted him the unique Predator Skill that allowed him to quickly amass power by absorbing enemies he defeated and acquire their abilities, so that after a few weeks he's already an Invincible Hero. He gets an assortment of girls following him in a Supporting Harem and as much as he'd like to give up his virginity, as a slime he now lacks the components necessary, and to complicate matters further he ends up acquiring a humanoid form that has a female appearance.
  • Stomach of Holding: He can consume things much larger than himself where they get stored in his 'stomach', without effecting his size which remains as a tiny little slime. Some of those he devoured appeared to be sent into something like a hyperspace like when Ifrit met Veldora in a dark place after Rimuru devoured him.
  • Supernatural Gold Eyes: In his human form, which helps denote his otherworldliness and his true power behind an unassuming form.
  • Super Strength: Has strength surpassing most living beings on the planet.
  • Super Senses: Has all forms of perception thanks to his Universal Perception.
  • Super Empowering:
    • Giving monsters names causes them to gain new powers and to evolve into a new form, e.g. the goblins that Rimuru meets evolve into Hobgoblins (a much stronger and more human-like race) when Rimuru gives them names. The act of naming monsters consumes mana and causes Rimuru to eventually pass out. That doesn't stop him from giving names to over 100,000 orcs in one marathon session (although the quality of names starts to dip fairly quickly).
    • After his Predator skill evolves into Gluttony, he gains the ability to impart skills to anyone he has a relationship with, regardless if they are a subordinate or not. However, he's limited by the recipient's own magical energy.
  • Tranquil Fury: After the incident where several of his followers were killed, Rimuru is so boiling with rage that he accidently activated his aura and had to put his Anti-Demon mask in order to repress it, and yet the mask started cracking. However, Rimuru manages to stay composed and even reasonable enough to refuse to kill Myulan, who was partially to blame for the situation, and even apologizes before arresting her (it helps that Myulan simply cast an Anti-Magic Barrier that prevented magic from interfering within the city, which played no part in the massacre). He also refuses to involve the human merchants in his upcoming war against the ones to blame out of fear of being responsible for more deaths.
  • Translator Microbes: His Magic Sense is able to translate messages of personal will (aka, speech) into forms he can understand.
  • Unskilled, but Strong: Veldora observes from within him he's exceptionally strong but ignorant of his capabilities. He doesn't realize there is no need to consume targets to use Predator, just touch and corrode them. Further he could have easily reacquired the ability to taste along with speech if he replicated the giant bat's tongue as well. This is lampshaded by Rimuru himself when he notes that the newly named Kijin inherited and learned skills from Rimuru that best fit their own inherent skills and experiences whereas Rimuru has little understanding of his own vast strength and plethora of skills. That's where "Auto Battle Mode" comes in handy.
  • Virgin Power: Being a near 40-year-old virgin was the reason he gained the unique skill "Great Sage" after reincarnating; mostly due to him invoking it while dying. This is a reference to the Japanese folk belief that remaining a virgin to 30 or 40 years of age gives a man magic powers.
  • Villainous Glutton: Albeit not that villainous he becomes the embodiment of it thanks to his Ultimate skill.
  • Vocal Dissonance: After reincarnation, his voice changes to that of a much younger androgynous person. He later develops a new human form that perfectly suits the voice.
  • Wild Card: He's considered the third strongest demon lord after Guy and Milim and after his total slaughter of a full half of the empire's full military force, both Guy and Rudra view him with unease as a potential unbalancing force between them. And it certainly doesn't hurt that just like those two he has a dragon lord hanging out around his place.
  • Wingding Eyes: As he lacks true eyes, the emotes actually protrude from his slimy body, such as a giant question mark.
  • You Gotta Have Blue Hair: Rimuru has pale blue hair in the light novel, manga, and anime, which matches with the color of his slime form.
  • Younger Than They Look: Around the time he gains the human form of a young teenager, he's technically not even a year old. Mentally he's actually 37 years old though since he's retained his memories from his previous life.

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