Characters / That Time I Got Reincarnated as a Slime — Rimuru Tempest

That Time I Got Reincarnated as a Slime Main Character Index
Tempest: Rimuru Tempest | Tempest Citizens
Other Nations: Non-Human Nations | Human Nations
Other: The Demon Lords | Other Characters

Rimuru Tempest/Satoru Mikami

King of Jura Tempest/Great Demon Lord

King Slime & Ruler of Monsters

^{Demon Lord}

^{Satoru Mikami}

Rimuru voiced by: Miho Okasaki (Japanese), Brittney Karbowski (English) ^{Foreign VAs}Monserrat Mendoza (Latin American Spanish), Alicia Bueno Ocaña (European Spanish), Shérine Seyad (French), Peggy Pollow (German), Elisa Giorgio (Italian), Bruna Nogueira (Brazilian Portuguese)
Mikami voiced by: Takuma Terashima (Japanese), Jason Liebrecht (English) ^{Foreign VAs}Eduardo Ramírez (Latin American Spanish), Nacho Ruiz-Cruces (European Spanish), Frederik Haùgness (French), Florian Clyde (German), Massimo Di Benedetto (Italian), Fernando Ferraz (Brazilian Portuguese)

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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• 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.
  • To drive this home, Ultimate Skills are the pinnacle of power. Possessing one makes you a Reality Warper capable of imposing your will upon the very physical laws of the universe. They are so rare that even some True Demon Lords and heroes do not possess one. Upon awakening as a True Demon Lord, Rimuru has four of these.
• Achievements in Ignorance:
  • So much so that Storm Dragon Veldora, in his side stories, can't tell if Rimuru is an unparalleled strategic genius, or a total moron. The acquisition of some of his abilities during his reincarnation also counts, as the "Voice of the World" interpreted his dying ramblings as wishes for certain abilities.
  • Of particular note is that, until informed of the fact, Rimuru had no idea he was employing four of the seven Primordial Demons. Due to the difficulty involved in demons remaining manifested long term on the material plane, Rimuru's Black Numbers are basically the closest thing in the setting to mortals employing the Legions of Hell as combat troops. This causes his fellow Demon Lords no end of consternation.
  • From the very beginning, Rimuru's act of naming monsters willy-nilly creates a Lineage that links him to these monsters at the soul level. Not only did naming these monsters make them more powerful, often allowing them to evolve into greater forms, but also during the Harvest Festival when Rimuru awakened as a True Demon Lord it resulted in ALL of the monsters he named getting another power boost. This basically ends up with Rimuru minting high-level magic born by the gross lot. Most Demon Lords presumably only Name their closest associates due to the risks involved which creates a cadre of evolved monsters to be their right hands. Rimuru makes an entire army of them entirely by accident.
• 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.
  • The manga spinoff The Slime Dairies and its respective anime adaptation give Rimuru a lot of Puni Plush, to the point where one would be forgiven for mistaking him as girl. As if to lampshade this, the very first punchline in the show is a Serious Business round table discussion involving all of Tempest's officers to decide on whether or not Rimuru would look better in a blue or yellow frilly dress.
• 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.
  • The anime handles how he becomes a True Demon Lord differently. In the manga, he was completely and utterly pissed as all hell when he sees the corpses of his fallen citizens, including Shion. He struggled with the idea that he had to truly kill another human directly. The moment he used Megiddo, he gave up his heart as a human and embraced having to dirty his hands. In the anime, he only goes as far as Tranquil Fury, as we don't see his face, and he clearly hates having to kill so many humans to revive his friends.
• 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-Loving Hero: Downplayed in the original novels where Rimuru, despite being very nice, is ruthless when it comes to handling people who have aroused genuine fury inside of him and will go as far as brutal torture and murder without batting an eye if it can be gotten away with, as well as use more subtle methods like intimidation and blackmail when those cards are off the table. However, in the anime his kindness and heroism is increased to the point of playing this trope straight.
• 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.
• Ambiguous Gender: Played With as mentally he is male and physically in his slime form he is genderless. His human form on the other hand, though equally genderless, is often treated as a female, to the point he is never shown bare chested either through clothing or convenient censoring.
• The Assimilator: Gains most of his skills by absorbing the bodies of his enemies with his [Predator] skill. After defeating the Orc Disaster it evolves into [Gluttony] due to merging with the latter's [Starved] skill, where his chance of gaining skills and his range of targets is increased alongside the ability to access the skills of his subordinates at will. [Gluttony] later evolves into [Gluttonous King Beelzebub] with his ascension to True Demon Lord where he is able to absorb everything including the soul of his target for skill gain, and even later absorbs other Ultimate Skills to evolve into [Void God Azathoth].
• Asskicking Leads to Leadership: He's the absolute ruler of Tempest and the High Chancellor of the Jura Tempest Federation (which includes allied kingdoms like the Armed Nation of Dwargon and Sorceror's Dynasty Sarion), not because of his skills at leadership and politics (though he does grow into those areas), but because he's so ridiculously powerful and skilled that he either defended them from harm, defeated them and offered to join him, or showed that he was worth making an ally of through both his power and good-hearted personality.
• Aura Vision: He doesn't have eyes in his normal slime form (even if he does make indents 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.
• Awesome, but Impractical: The Megiddo spell is an incredibly devastating attack that can single-handedly wipe out a whole army when cast and ignores most Anti-Magic effects since the light beams are completely natural phenomenon, but Hinata is able to realize several critical weaknesses of it after mulling over it. First, because it involves focusing sunlight, it can only be used when the sun is present, meaning it's impossible to cast at night. To get around this, Rimuru had to set up a network that would let him reflect sunlight from the other side of the planet if necessary. Second, anything that could sufficiently scatter the sunlight such as a massive amount of dust or fog drastically reduces its effectiveness. Third, while not affected by Anti-Magic, a sufficiently powerful physical barrier could still block it just fine unless Rimuru focuses the beams as he notes it would be an impractical attack to use on the Empire's tanks due to their armor.
• Awesomeness by Analysis: While he's not on the same level as Great Sage, 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.
• Batman Grabs a Gun: Being a former human, he established a rule to not attack, let alone kill any of them. Then Falmuth attacked Tempest and killled several citizens, and the only way to revive them is for him to become Demon Lord by killing at least 10,000 people...
• Benevolent Mage Ruler: Ruler of the Kingdom of Tempest and strongest member of the nation.
• Berserk Button: Summoning. He has held contempt with the idea alone well before he was even named, considering it as nothing but glorified slavery. After he became a demon lord, he began placing huge amounts of pressure on nations that practiced it, and even got Leon Cromwell to stop.
• Beyond the Impossible: After the war with the Orc Disaster, naming over 150,000 Orcs should have been impossible, even with Veldora's massive reserves. Rimuru circumvented this by absorbing the oversaturation of magicules they had left in them and giving them back at near 100% efficiency before they faded, allowing the whole race to evolve to High-Orcs. Veldora himself admitted that this should have been impossible, and fears what would happen if someone less benevolent that Rimuru figured out how to pull it off.
• 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.'
• Big Eater: Due to his slime physiology and the Unique Skill Predator, Rimuru can swallow massive quantities of food and either break it down nigh instantly or store it inside his Hammerspace. This includes objects many times his normal size as shown when he eats Veldora and the Unlimited Imprisonment seal all at once. It was only once he got back his sense of taste did he start partaking in grand feasts in the conventional method of this trope.
• Black Swords Are Better: The signature sword he has Kurobee forge for him is a jet-black blade that initially starts out with no unique abilities, but it's an Evolving Weapon that will grow with him. More importantly, even in its base form it has the trait of durability, meaning it will never break, bend, or be overloaded by his considerable magical power, letting him fight all-out without worry of a Wrecked Weapon ever again. Eventually, it evolves so that while it remains black in its normal form, when he channels his magical power through it it starts shifting colors.
• Blob Monster: He's a sapient 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.
• Boxing Lessons for Superman: Even before assimilating the Orc Disaster, Rimuru was already the strongest being in Jura forest. After encountering and making a group of ogres into his subordinates, he undergoes swordsmanship training under Hakurou, the ogre Master Swordsman. This training allowed Rimuru to pass a Secret Test of Character from the nearby Dwarf King who was also trained by Hakurou when he was still an unnamed ogre. Eventually, Rimuru's skills with the sword grow to a level that he can go toe-to-toe against other swordmasters like Hinata Sakaguchi.
• Cannibalism Superpower: One use of his Predator skill is to gain the powers and mimic the appearance of whoever he consumes.
• Casual Danger Dialogue: Due to events rearranging in the anime, when he notices Berretta looking at the parts of a doll he defeated, they were having a strange but calm conversation during the fights that were going on.The manga this conversation happens after Clayman is defeated.
• Celibate Hero: Downplayed. Though he indeed has no 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. However, absolutely none of that stops him from ogling sexy women in sexy outfits and getting excited over it.
• 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 potions^note Which itself can be made by diluting Full Restore 5 times. 10 times.
  • In a similar vein to the above, all the magic ore he ate ended up being processed into the magisteel Kaijin needed for his swords, and Rimuru's duplication skill was able to use them to fill his order, allowing Kaijin to maintain his pride and eventually leads him to join the Goblin Village that would eventually move to found an nation.
  • Rimuru's absorption and assimilation of the Orc Disaster Geld provided him with the latter's Demon Lord Seed, allowing him to evolve into a True Demon Lord after destroying Falmuth's main army, thus allowing him to resurrect the Tempest citizens that were killed by Falmuth's advanced scouting party.
• 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 Shizu's teaching duties when arriving at Ingracia, and can easily handle the unruly Summons class taught by her, because he was the only one 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!"
• Curb-Stomp Battle:
  • Dishes many of these out, but the most notable would definitely be his one-man assault on the 20,000-strong Falmuth army since it's one of the only times he's ever gone into a fight fully ready and willing to just exterminate the opposition. To call it a battle would imply the army even had a chance to fight back.
  • His fight with True Demon Lord Clayman is also incredibly one-sided. Despite having acquired new powers, Rimuru easily devours his strongest attack Clayman thought he couldn't even do. Then he Offhand Backhands him in one hit, knocking on his ass. Even before, Clayman barely touched Rimuru during their fight. This ends with his death when Rimuru completely devours him and his attempt to use Astral Body.
• 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. He 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.
• Discard and Draw:
  • Played with during his Harvest Festival. In order to evolve [Gluttony] and [Great Sage], he sacrifices [Merciless] and [Degenerate] respectively, but in effect the "sacrifice" allowed them to evolve into the Ultimate Skills [Gluttonous King Beelzebub] and [Wisdom King Raphael] respectively, which have the abilities of their "sacrificed" skills added to the package of the base skills alongside being even stronger.
  • Ultimately subverted during his second fight with Hinata. In order to survive Hinata's Meltslash head-on, Raphael quickly instructs him to sacrifice [Beelzebub] to be able to take and absorb it. This works...and then it's revealed that not only did Raphael successfully copy Meltslash as a result, but she backed up a copy of [Beelzebub] and used the data from absorbing the holy attack to perfect [Covenant King Uriel's] Absolute Defense, meaning it was ultimately an utter net win for him at no cost. She then reveals he very likely would have survived (albeit exhausted and in poor condition) a direct hit from Meltslash without "sacrificing" [Beelzebub], and Rimuru infers the reason she sounded panicked in the first place was because she wanted to trick him into taking it head-on so he could get all these benefits.
• Distracted by My Own Sexy: After ascending to True Demon Lord status and preparing to release Veldora back into the world, Rimuru notices his most recent growth spurt for his human form and creates a Doppelganger that's an exact copy of his current self in order to use it as a vessel for Veldora's spirit to get a better look. He's noticeably taken aback and blushes as he thinks about how "beautiful" he is before composing himself.
• 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 Super-Scream 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.
• Dragged into Drag: Shion and Shuna love to force Rimuru into wearing clothes meant for women. He doesn't mind some of the time, though when they start bringing out the risque stuff is when he starts trying to run.
• Dude Looks Like a Lady: Although he identifies as male, his human form is sexless and resembles the young woman he ate to obtain it. 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.
• Effeminate Voice: Rimuru is a man who got reincarnated into a slime and his new human form looks like a cute young girl (although he's in fact sexless). The anime gives him a high-pitched voice provided by a woman, making it even easier to mistake him for a girl. In fact, his voice changes from his old masculine voice to his new feminine voice during the process of him becoming a slime, with his feminine voice becoming official at the same time as his new body.
• Egopolis: The city of Rimuru, capital of his founded country takes after his name. However, it wasn't him who decided on this, but was agreed upon by all his subordinates and he simply went along with the idea.
• 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.
• Energy Absorption: When he's not out to outright assimilate people, Rimuru can use Gluttony/Beezlebub to absorb a foes' magicules directly to weaken them while replenishing his own stores. This even works on someone as strong as Milim, though given Milim has infinite reserves of magicules, this fight of attrition won't end well.
• Extreme Omnivore: The list of things he can eat would take up most of this page. He started with magical herbs and ores, then goes to eat Veldroa and his prison. He heals the goblins by eating them and spitting them out after he splashes them with the Full Potions in his body, and he copies Kaijin's sword by eating it and analyzing it inside of him. He is able to copy and amplify spells by consuming the spells themselves.
• Eyes Always Closed: His Slime form gives off this impression with the two, thin lines that seemingly serve as his eyes.
• Failed a Spot Check: During Walpurgis, Rimuru notices that Frey's male attendant who has a lion face is emitting a large amount of magicules, as Raphael tries to reveal that it is Carrion, but Rimuru dismissed that due to thinking that there would be no way that Carrion was hiding himself with such a obvious disguise.
• 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.
• A Form You Are Comfortable With: Rimuru often takes human form when talking with humanoids so that they can more easily conduct conversation. In some cases this backfires, with visitors seeing him as a mere slime trying to imitate a person.
• Founder of the Kingdom: Rimuru starts off simply trying to create a livable settlement for the goblins and direwolves he befriended in their small corner of the Jura Forest. This eventually turns to him taking on other monsters and expands his village into a small town, then eventually a city which is then recognized as a small country by the nearby dwarf king and other leaders. As time passes, his fledging country expands both in size, power, and influence.
• 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.
• 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.
  • Downplayed slightly, in that he is at least capable of giving good names when he isn't naming hundreds, thousands or tens of thousands of individuals. His practice allowed him to do in three minutes what the other demon lords couldn't do in three months, come up with a good name for the group.
• The Good King: Rimuru places kindness and compassion first and foremost, and is willing to forgive his enemies provided they are willing to atone for their actions — being out to create a nation where different species of monsters and humans can live in harmony with each other. However, if your actions directly result in his subjects getting killed, he will be less forgiving.
• God-Eating: He practically starts out doing this by absorbing the sealed Veldora Tempest via [Predator], though this was a willing act on both parties' ends as doing so would allow him and Veldora to analyze the Unlimited Imprisonment at their leisure and eventually free Veldora. In a much more serious manner, he ends up having to do this again on a Brainwashed and Crazy Veldora and Velgrynd to free of them of their state during the war with the Eastern Empire, which allows gives him access to their powers and lets him become a True Dragon/Ultimate Slime himself.
• God-Emperor: Even before Rimuru became a True Demon Lord, to the inhabitants of Tempest he was all but a deity in name due to his strength and his kindness. His Cult of Personality only grows larger with each successive feat of strength or politics drawing more people to him and his cause. He finally becomes this in all respects when he evolves into an Ultimate Slime/True Dragon at the climax of the war with the Empire.
• 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 Falmuth 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.
• Guile Hero: Basically the kind of hero he ends up being. In other media, he basically set up his own contingency plans to ensure he gains favor from the other Demon Lords while going out of his way to antagonize Clayman. Also true to the trope, he goes out of his way to make modern food from Japan in order to make money.
• 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 Factor: He starts out with Self-Regeneration, allowing him to repair most physical injuries as long as he gets time to let it work its magic. He later upgrades to Ultraspeed Regeneration, which turns the speed and potency of healing up to the point that unless it's an attack aimed directly at his soul, he can constantly and nigh-instantly heal from anything short of atomic destruction. And then he reaches Endless Regeneration, which removes the weakness to spiritual attacks and basically means an attack needs to utterly destroy him on the physical and spiritual level to guarantee death.
• 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.
• Hidden Depths: The Falmuth arc illustrates exactly how far he is willing to go to protect his friends. While the Falmuth army had it coming on the whole, Rimuru slaughtered soldiers who were willing to surrender, implicitly committing a war crime, in order to fulfill his quota for ascending into a True Demon Lord. Coming from someone who had seemed up to that point as an All-Loving Hero, this can come off as rather jarring.
• The High King: As leader of the Jura Federation he is this. Many of his advisers and inner circle are technically the leaders of the tribes/clans of monsters that make up the nation including; Rigurdo (goblins), Ranga (wolves), Benimaru and Shuna (onis/kijins), Treyni (dryads), Gabiru and his family (lizardmen), and Geld (orcs). That being said, unlike more traditional examples of this trope, Rimuru holds significantly more direct power over everyone and is more omnipresent in affairs because...everyones pretty much forces him to.
• Hihi'irokane: His black katana evolves into being composed of this metal after constantly absorbing and being exposed to his potent magical energy after its forging thanks to Kurobee from an already magicule-saturated metal. The result is a sword that's among the ranks of Unbreakable Weapons, can channel his magical power without fear of breaking down, will only use its full power in his possession (and turns a sweet multicolored form when he does channel magic into it), and is classified as a Mythical/God-class weapon.
• Human Outside, Alien Inside: His transformations are usually only skin-deep. When Hakurou cut off his arm or when Milim grazed his face with a punch, the human skin was torn away to reveal the blue slime underneath.
• Human Sacrifice: Devours 20,000 souls for his evolution into a True Demon Lord.
• I Cannot Self-Terminate: Before going on his way to gain the number of souls necessary to become a Demon Lord, he pleads with 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. Thankfully, that doesn't have to come to pass since Rimuru is still the same person.
• Immune to Mind Control: Thanks to Great Sage, he can shut down mental intrusions trying to mind read or possibly mess with his mind, and this effectiveness only increases after he gains Ultimate Skills, which render him immune to any mind-manipulation ability that doesn't come from another Ultimate Skill. Veldora as he's being rendered Brainwashed and Crazy severs their Soul Corridor briefly out of fear that Rudra could Dominate Rimuru through the connection and his possession of Wisdom King Raphael (which is subordinate to Rudra's Justice King Michael), but Raphael evolving into the Manas Ciel and fusing the skill with Gluttonous King Beelzebub to create Void God Azathoth renders this method of attack null.
• 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 Falmuth, 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.
• It's Personal: While Rimuru makes enemies, none of those were personal. But when Falmuth attacked Tempest, and Clayman sent Myulan to weaken his citizens, both King Edmalis and Clayman were on his shitlist, by imprisoning the former along with his aides, and out for blood for the latter.
• It Only Works Once: This is the whole point of Uriel; once an attack that is effective is analyzed, it is useless on repeat uses. The same can be said of his previous death by stabbling. He has no blood or internal organs that would be affected by stabbing, meaning common knives like what killed him as Satoru Mikami will never be useful against him.
• 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.
• Long-Haired Pretty Boy: Rimuru's human form is very feminine-looking complete with waist length hair. The body is sexless by default, but Rimuru identifies as male because he was a man in his past life.
• 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.
• Magnetic Hero: Due to a combination of his Nice Guy personality, immense power, and frequent habit of introducing increasing luxurious comforts from his past life, he's a near-natural at making almost everybody he meets want to join his side, becoming close friends with various influential people from throughout the world, including several Demon Lords, one of the True Dragons, and at least four leaders of entire nations.
• Making a Splash: He gained water manipulation skills after absorbing the water of a lake and infusing it with magicules to use it as a projectile.
• Manly Tears: Sheds these after absorbing Shizue's corpse using his Predator skill and gaining his human form.
• 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.
• Mercy Kill: In chapter 70.5, he kills a wounded soldier who begs him to spare his children since he knew what he was in for. Rimuru tells him they'll be spared and returns the man's pendant.
• 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.
• Morality Chain: He's the reason a lot of very powerful monsters haven't gone on rampages throughout the world. According to Chloe, in the timelines where he dies fighting the Eastern Empire it sends both Milim and Veldora on a world-destroying Roaring Rampage of Revenge.
• My Greatest Failure: The biggest world-shaking event for him personally was the slaughter of his people by the Falmuth Empire, as he blamed himself for being too adamant about peaceful coexistance with humanity, realizing that he forgot how no matter the world, there will always be people who seek conflict out of greed. While his citizens repeatedly reassured him that they viewed it as their own failure because they became too complacent and reliant on Rimuru, it was this incident, and his chance to both get revenge and revive the fallen as motivation, that made him officially adopt a Good Is Not Soft attitude towards potential conflicts and set up a Martial Pacifist military that would prevent such a tragedy from ever happening to his people again, starting with decimating the entire military of Falmuth and using their souls to become a Demon Lord who could revive his dead followers.

N-Y

• New Life in Another World Bonus: Rimuru Tempest has Predator, allowing him to copy the abilities and transform into any creature he eats; Great Sage, a nigh-omniscient guide that can tell him almost anything about the world; Pain Nullification, which allows him to Feel No Pain; and the ability to No-Sell most types of attacks (including ice, fire, and piercing attacks). And he is a Slime, so he can regenerate his body. All were acquired when the world interpreted his dying thoughts as him desiring these abilities, completely without his realization until after the fact. On top of this, he first appears in a cave filled with magical plants: by eating all of them, he absorbs a tremendous amount of Magicules, granting him a nearly-bottomless supply of magical energy as well as the ability to craft large amounts of extremely powerful healing potions. Towards the end of the series, he gains the ability to access any point in Space-Time without causing a paradox threatening his own existence. He gets so many cheats later that his cheat skills begin to develop cheat skills.
• 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. The anime makes him a straight-up All-Loving Hero.
• 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. This is because he remembers being a human man.
• Nonchalant Dodge: Rimuru's test fight against the Ingracia students mostly consists of him doing this, with an occasional No-Sell.
• No-Sell:
  • He has a tendency to do this to attacks and people, due to a combination of slime biology, Healing Factor, various Resistances and Nullification skills, and just being flat-out much stronger than most of his enemies, and what he can no-sell just gets bigger as he gets ever stronger. One of the more notable times would be when the Primordial Demon Jaune/soon-to-be Carerra tried to intimidate him by flexing her Battle Aura when she thought he was looking down on her and not believing he was worthy of being her master. As this was after his ascension to Demon Lord, he didn't even notice her attempt (and keep in mind, Jaune was strong enough to launch magic nuke spells at Demon Lord Leon out of boredom), shocking her enough to admit he was strong enough to be worthy of her respect and loyalty.
  • A funny instance occurs when he fights Ifrit in a seemingly high-stakes climactic battle at the apex of the Shizu arc, assuming it to be a powerful and dangerous foe. Rimuru eventually gets caught in a powerful fire attack and screams in terror, fully expecting it to be the end of him... just before realizing that he's not actually taking any damage due to his thermal resistances no-selling fire, making the fiery titan a Zero-Effort Boss.
  • His biology allows him to ignore attacks that need to hit vital organs, as he has no vital organs. All of his cells can be used for every fuction, meaning he has no need for a heart, lung, a brain or any other organ that most creatures need to live.
  • The major function of Covenant King Uriel is to serve as this thanks to its "Absolute Defense". While not technically "absolute" since there do exist attacks (usually just as game-breaking) capable of piercing it, Raphael can analyze any attack that does so and readjust the defense so that it won't work a second time.
• One-Man Army: He wiped out a 20,000-strong human army on his lonesome. He wasn't even a True Demon Lord yet, that was just his method of gaining the 10,000+ souls he needed to become one, which made him even stronger.
• One-Winged Angel: Invoked and subverted during his battle with Hinata. He assumes a Shapeshifter Mashup combining multiple different forms he's absorbed, turning into a horrific abomination that Hinata notes is clearly designed for combat. But it's really just a Doppelganger of himself he sent against her while hiding his real self so that she'd think she's won and go away, letting him get back to Tempest unimpeded.
• Only a Flesh Wound: Rimuru receives "fatal" wounds with an alarming frequency, but since he's actually a slime they have no real effect on him since he has both the Pain Nullification and Self-Regeneration skills on hand. Nothing short of total bodily destruction would probably stop him.
• 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.
• Pint-Sized Powerhouse: His true form always looks like a tiny, cute blob that could easily be mistaken for a mere Cute Slime Mook, even after he gets to a power level where he could wipe out entire countries with minimum effort.
• Playing with Fire: Gained fire manipulation abilities after devouring Ifrit.
• 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.
• Porn Stash: Played for laughs. As a one-off joke, his last request as a human is for his kouhai to destroy his computer by throwing it in the bathtub.
• 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.
• The Power of Friendship: Covenant King Uriel, aside from its Space Master abilities, is what allows Rimuru to store and access all of his subordinates' Skills provided through Gluttony King Beelzebub's Food Chain, and can be considered "the crystallization and proof of" Rimuru's bonds with all his companions.
• 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.
• Real Name as an Alias: He introduces himself as "Satoru" as a disguise while meeting some envoys in the spin-off.
• Red Baron: Ruler of Monsters. Spoofed when he first became a Demon Lord, as when Rain introduces all of the current members of the newly-named Octogram by some awe-inspiring title, he gets saddled with the lame title of "Newbie." Later, he gets upgraded to the much-more-badass sounding "Chaos Creator."
• Refusal of the Call: After defeating the Orc Disaster, Rimuru had surpassed the minimum level of strength needed to proclaim himself a Demon Lord but refused to stake his claim, not wanting to deal with the hassle such a title would bring and constantly refusing Milim's pleads to do so. Events would conspire to ensure he would become one which as it turns out were partially engineered by the time-traveling Chloe, who knew if Rimuru didn't become a True Demon Lord he wouldn't be strong enough to defeat the real villains showing up in the future.
• Reincarnated as a Non-Humanoid: Although he was once a human, he reincarnated into a slime after being stabbed to death.
• Resurrective Immortality: After evolving into an Ultimate Slime from devouring a Brainwashed and Crazy Veldora and assimilating his power during the war with the Empire, Rimuru is registered by The Words of the World as a new True Dragon, which comes with all the benefits such as the ability to revive after death.
• 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.
• Secretly Selfish: He admits to himself that a lot of his technological and cultural innovations (especially Japanese-centric cuisine and customs) to both Tempest and by extension the world are in part because he wants to recapture even just a bit of his former life and world by recreating it in this one to ease a bit of the homesickness. The fact he recognizes this selfishness and how his citizens always give their best to fulfill these desires is partially why he's so devoted to making sure they can also benefit from the joy these things bring him.
• Seven Deadly Sins: Wields the Ultimate Skill Gluttonous King Beelzebub.
• Seven Heavenly Virtues: Wields the Ultimate Skills 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, and becoming a True Demon Lord also makes his human form appear slightly older and gives him sharpened fingernails. He usually only shifts his outer appearance to humanoid, as on the rare occasions he takes physical damage in his human form, his skin is torn away to reveal the real slime form beneath.
• Shapeshifter Baggage: Has no problems taking forms that use less of his body mass but need to substitute parts with magiclues 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.
• Significant Wardrobe Shift: Shortly after gaining his human form, Rimuru takes to wearing a blue coat and boots with blue fur trim, a yellow scarf, and black pants. After becoming a True Demon Lord, he swaps his outfit to a mostly-black ensemble consisting of a coat with white streaks on the sleeves, a vest with yellow trim, a tunic with fur trim around his neck, pants, and boots.
• So Last Season: Played with. Rimuru is by no means weak even at the story's start thanks to winning the Superpower Lottery, capable of flattening most of the human kingdoms with ease. But this power trip ceases when he gains the attention of the Demon Lords, many of whom are vastly stronger than Rimuru is; his first encounter with Milim could've ended far worse if she were actually out for blood. His fight with Hinata and Falmuth's attack on Tempest were his wake-up call to start learning how to get stronger.
• Soul Power: Can manipulate souls through Arcane Magic.
• Slasher Smile: Upon seeing Clayman abusing Milim as a slave, he sports an angry looking variant of these.
• 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.
• Slime Girl: Played With. Rimuru is a Slime, though not a girl, owing to his lack of sex in his usual form. He has a human form which looks more or less female, being based on Shizu's body, though it lacks attributes similarly to his slime form. Rimuru himself identifies as male and is often frustrated when taken for a girl.
• Space Master: Gains this ability after attaining the Unlimited Imprisonment Skill and evolving it to the Ultimate Skill Covenant King Uriel. His mastery of this is such that he can teleport himself and any number of allies and/or objects to nearly any place in the world at his discretion, create multiple barriers of isolated dimensional space, imprison foes in interlocking/intersecting dimensions, and eventually the ability to traverse dimensions at will.
• 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.
• Stupid Sexy Flanders: All those under him know that at the bare minimum he's a genderless slime, and more specifically has a male identity, but many of his male servants can't help but find him cute and attractive in spite of most of them viewing themselves as straight.
• Supernatural Gold Eyes: In his human form, which helps denote his otherworldliness and his true power behind an unassuming form.
• Superpower Lottery: Rimuru unknowingly acquires various unique abilities as he is being reincarnated into the new world as a slime. Throughout the course of the story, he further develops other unique abilities either by assimilation, skill acquisition through analysis and his connection with his subordinates, and the evolution of his already existing skills. Over time, he becomes one of the most powerful beings in the world.
• Super-Scream: Devouring a giant bat monster granted him the ability to project sound from his body up to levels that let him flatten forests, but for the most part he sticks to using it to speak normally without telepathy.
• 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 Magicules and causes Rimuru to eventually pass out. That doesn't stop him from giving names to over 150,000 orcs in one marathon session (although the quality of names starts to dip fairly quickly).
  • After his Predator skill evolves into Gluttony thanks to eating the Orc Disaster and merging his Starved skill with Predator, 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. In turn, he gains access to their skills and can use any evolutions to their skills even if he didn't obtain or provide those evolutions himself.
• Technically Naked Shapeshifter: Downplayed in that he does wear actual clothes rather than form them out of his slime mass and even holds them in Hammerspace, but it never truly occurred to him that he's always naked in his slime form until Milim points it out in The Slime Diaries Episode 9, to the amusement of Shion and Shuna and his own horror. He then has a moment in his slime form going down Tempest's streets and realizing he's basically being an exhibitionist right now and can't stop blushing.
• To Win Without Fighting: Rimuru's philosophy as a ruler is to try to avoid conflict as much as he can and possibly build friendly relations with those of other countries/powerful entities. To this end, he tries diplomacy towards those who would seek conflict with him and would only make a showing of his strength to serve as a warning. He would only resort to violence if the opposition would be a danger to everyone including his subjects (such as the Orc Disaster and Charybdis) or if his subjects were attacked without provocation (like the Kingdom of Falmuth).
• Took a Level in Badass: While he already starts the story out badass, with every new threat faced he acquires more skills and strength through absorbing their power by eating them with Predator, along with just general work towards improvement. In the beginning he was about middle-ranked in the world, by the end of Season 2 Part 1 he's a contender for the Top 10 with his evolution to True Demon Lord, and later on after becoming a Physical God he's the World's Strongest Man, with only a seriously fighting Milim or Guy even having a chance of fighting him properly.
• Tranquil Fury:
  • After the incident where several of his followers were killed, Rimuru is so boiling with rage that he accidentally activates his aura and had to put his Anti-Demon mask on 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.
  • And speaking of Myulan, when he interrogates her, she reveals that she was under Clayman's employ and in possession of her heart, Rimuru doesn't mince words about this:
    Rimuru: Because you valued your own pitiful life more. You decided to damn my people.^note In this context, he knows Clayman is listening in on their interrogation, and is essentially insulting him rather than Myulan
  • When Hakurou tells Razen his country pissed off the wrong person, he wasn't kidding at all. Rimuru completely and utterly kills 20,000 Falmuth soldiers with Megiddo, a skill that slaughters the opposing army without resistance, all without any aggressive rage, and in fact his attack motion was very calm and precise. Then when he holds the king and his bishop dead-to-rights, the king foolishly strokes his ego in front of him, thinking Rimuru would bow to him. He was proven dead wrong when Rimuru's next attack cuts off his left arm, this time done with a calm voice and while not moving a muscle for the slash.
• Translator Microbes: His Magic Sense is able to translate messages of personal will (aka, speech) into forms he can understand.
• Tsundere: A friendship example. Rimuru seems aggravated when dealing with the likes of Milim, Veldora and Ramiris, due to their tendencies to cause trouble that he has to solve, but he internally admits that he cares very much for them but doesn't want to admit it out loud to keep them from being too troublesome. His devotion to them can be seen when he makes it his priority to make Clayman suffer after witnessing him hit Milim and he goes on a Roaring Rampage of Rescue when Rudra dominates Veldora with his Ultimate Skill.
• Ultimate Life Form: By the end of the series, Rimuru evolves into an "Ultimate Slime", the absolute pinnacle of his monster species. For comparison, the average slime is barely qualified as a non-sapientmook that's treated as a snack under certain circumstances. Rimuru by the end is an immortal Nigh-Invulnerable Physical God with potential for limitless growth via assimilation and a top contender for title of World's Strongest Man.
• Underestimating Badassery: It goes both ways with him:
  • He doesn't look particularly imposing, especially in his tiny true form. Combine this with the fact that slimes are not exactly known for being particularly powerful or cunning, and you can understand why Rimuru is on the receiving end of this trope a lot. Nevertheless, underestimating him tends to go poorly for the unfortunate opponent.
  • He has a terrible time gauging the power of his own people. He felt that Shion's Team Reborn would be ineffective against the paladins that were sent by the Luminaries at first since individually each member would be much weaker than a paladin and at most they would only be able to act as a delaying force despite greater numbers. However, since none of the paladins had any soul damaging attacks, Team Reborn was practically invincible and stalemated them all with ease, to the point they incapacitated roughly half of the paladins in the first exchange via various dirty tricks before they caught on to their foes' apparent invincibility and started fighting smart, and even then they wouldn't need the ready reinforcements Rimuru had on standby from Benimaru's forces.
• Universally Beloved Leader: 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.
• 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.
• Unwanted Harem: By the end of the web-novel, Rimuru has Shion, Shuna, Milim, Chloe, Elyune, and a number of other girls falling for him... but despite enjoying being fawned over by them decides that actually romancing them isn't worth the trouble.
• 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 (also much memed about in the West) 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.
• Weak, but Skilled: Compared to some of his fellow demon lords in the beginning. He is both the youngest and least physically powerful, but posessing four Ultimate Skills automatically qualified him for one of the world's most versitile monsters, and Raphiel made this even more extreme.
• Weather Manipulation: When he was named by Veldora, he earned Veldora's divine protection which manifests in giving him access to the "Storm" element that Veldora owns. This is the source of the Black Flame and Black Lightning Skills which are actually tapping into Veldora's Storm element. Later on, he develops the Sword Art Stormbreak which is based on Hinata's Meltslash, incorporating Veldora's Storm element into a strike that tears apart and destroys the target utterly via the secondary damage once it connects.
• Wholesome Crossdresser: Despite his insistence on seeing himself as male, Rimuru usually has little to no problem wearing feminine clothing with a bit of arm twisting from Shuna, much to the delight of pretty much everyone in Tempest. It's up to the point in "The Slime Diaries" they made a skimpy two-piece swimsuit for him to wear for the Beach Episode. He turned it down in the episode proper for a limb-covering one-piece due to considering such an exposing girly outfit to be going a bit too far, though we do end up seeing him in it for the next episode preview. However, he has his limits. Risque stuff like a Playboy Bunny outfit is definitely crossing the line and he will run away.
• 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. It certainly doesn't hurt that just like those two he has a True Dragon 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.
• Worf Had the Flu: Played with. He has to fake his death to escape Hinata (by letting the doppelganger fight while his true body hides in the grass) because she's got multiple barriers weakening him, but he secretly ponders that even without said barriers, a straight up fight between the two of them would be an extremely dicy proposition for him, especially considering the fact that she's got magic sword techniques capable of destroying his soul in seven unblockable attacks.
• Workaholic: While he dislikes overexerting himself with constant work, like how Geld pushes himself out of his desire to aid his lord, Rimuru ended up getting so involved with managing the various aspects of the Tempest country, and doing it for so long, that when he gets his first day off in The Slime Diaries Episode 2, he gets extremely antsy at having nothing to do, and ends up outright looking for any kind of work that can keep him occupied. He even apologizes to Geld about trying to get the guy to lighten up his workload when he himself is just as work-obsessed, though as Geld notes, Rimuru does it because he enjoys a moderate amount of physical and mental exertion, unlike Geld who works to ignore his troubles.
• Wrong Assumption: Rimuru assumes that Charybdis was coming to Tempest because of wanting to fight Veldora who was still inside him. At first, He could've let Milim kill it in his stead (which was something he wanted her to do and she was perfectly willing to do it) but in accordance to the advice of his subordinates, decides to handle the threat personally, reasoning that Milim is a guest of Tempest and thus shouldn't be fighting battles on its behalf. After fighting the monster to a stalemate, he learns that Charybdis came to Tempest to fight Milim.
• Your Soul Is Mine!: After slaughtering around 5,700 enemy soldiers in less than a minute using Megiddo, making sure to drag it out a little so that some of them had a few seconds to watch in horror as their fellow men are killed before dying themselves, Rimuru is granted the [Merciless] skill. Said skill makes it where, while active, all enemies within a large radius who have lost the will to fight will get their souls ripped from their bodies, killing them instantly. It can be controlled to intentionally leave specific broken-willed enemies alive if Rimuru wants. Upon his proper ascension to Demon Lord, [Merciless] merges with [Gluttony] to become [Gluttonous King Beelzebub], which combines the effects of the two skills.
• 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.

Great Sage/Wisdom King Raphael

Voiced by: Megumi Toyoguchi (Japanese), Mallorie Rodak (English), Circe Luna (Latin American Spanish)

Rimuru's most consistent and trusted companion. While technically speaking she is one of Rimuru's skills, in practice she's more like a magical A.I. that aids him in any way she can. However, while she starts off as just a magical A.I., over time she develops into something more...

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Tropes relating to Great Sage/Raphael

• Archangel Raphael: As an Ultimate Skill she's named after him, and has several associations with Raphael's areas, such as water and healing through her master Rimuru, and her role as Rimuru's Benevolent A.I. also mirrors Raphael's placement as a guide.
• Awesomeness by Analysis: She has an encyclopedic understanding of both the world and Rimuru's capabilities as a slime, and will offer him options and warnings based on his current situation while also speeding up her and Rimuru's thought process via [Thought Acceleration]. Once she evolves into Raphael, if given enough time to observe an enemy she'll let Rimuru learn new skills in the middle of combat to match or counter the foe, and she can even analyze enemy equipment and draw up "blueprints" for Rimuru to create it later without even needing to have Rimuru devour it first. To give an idea of how good their analysis is, the upgrade to [Thought Acceleration] brought on by Raphael's evolution means one second to them is equal to 277 hours (11.5 days) and that's not even the limit of how fast they get.
• Benevolent A.I.: She's basically a magical version of this. She assists Rimuru in all aspects of his life, analyzing his surroundings and offering possible solutions to the problems he encounters. She later evolves into the Ultimate Skill Wisdom King Raphael, whom Rimuru affectionately calls Raphael-sensei. 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.
• Berserk Button: For the most part, she lets a lot of the idiotic things Rimuru does slide, no matter how counter-intuitive they might be to her attempts at helping him. But the one thing that will genuinely piss her off is Rimuru implying or even stating he doesn't need her help. Whenever that happens, she goes beyond Tsundere and gets belligerent, intentionally revoking her aid and leaving him to flounder and fail until he settles down, realizes he insulted her, and apologizes.
• Brainwashed and Crazy: Downplayed. Due to her emerging sentience, Raphael is able to resist the outright Mind Control caused by Rudra's Justice King Michael exerting its will on the other Angel series skills and their owners. However, Michael still has enough influence to cloud her calculations and decisions and it nearly gets Rimuru killed when she's almost tricked into taking a dead-on blast from a Brainwashed and Crazy Veldora's full-power Breath Weapon believing she can block it, only avoided by Rimuru ignoring her words and dodging it. When she evolves into a Manas as Ciel, she's able to shake off his control completely.
• Deadpan Snarker: After Rimuru's evolution, he notices that her fluency increased, to which she repeatedly tells him "No, it's your imagination" in a blatantly lying tone.
• Determinator: During Rimuru's evolution into a True Demon Lord, she makes hundreds of attempts to evolve into an Ultimate Skill in order to be of more use to Rimuru. She finally succeeds after getting the idea to sacrifice and integrate the Degenerate skill as a cost for receiving a gift from Rimuru's Harvest Festival.
• Emotions vs. Stoicism: The problem with her gaining an ego after evolving into Raphael. While originally made of pure reason, she slowly gained emotions through interaction with Rimuru. Side effects of this were that her perfect calculations were disrupted through newfound anxiety, but it also allowed her to search more efficiently for solutions to problems.
• Exact Words: When Guy Crimson comes to Tempest to seek Rimuru's aid in evolving Mizari and Rhein to the same level Diablo is at she states that it would take 500,000 souls to complete the demons' evolutions. When Guy gives said souls to Rimuru to perform the task, it turns out that Rimuru only needed 200,000 souls to perform the act (as Mizari and Rhein needed 100,000 souls each), while in fact the other 300,000 would be used to evolve Ultima, Testarossa, and Carrera.
• Excuse Me While I Multitask: Thanks to the [Parallel Operations] sub-Skill, Raphael and Rimuru are able to separate and run their Analysis in tandem with their regular thought processes, which are all also being further enhanced by [Hasten Thoughts]. This allows them to fight physically; cast magic; use Skills; constantly analyze the battlefield, the enemy, and incoming attacks; and come up with various solutions all at once. Once Raphael evolves into Ciel and thus a separate soul, along with the development of Void God Azathoth, both she and Rimuru are effectively running in total four different thought processes at once at several hundred million times faster than normal.
• Gameplay Automation: She basically acts as a living example of this when Rimuru activates "Auto Battle Mode", with her utilizing high-speed calculations and full understanding of their powerset to hyper-efficiently figure out the best ways she can use Rimuru's abilities to beat enemies, all while Rimuru takes a mental backseat.
• Grew Beyond Their Programming: Her main purpose is providing Awesomeness by Analysis abilities to Rimuru, giving him information and telling him the best ways to use it. However, even early on, she starts developing a bit of personality, with her giving occasional snarky comments and opinions. As time goes on she gets more and more vocal about her personal thoughts on how Rimuru does things, and during Rimuru's Harvest Festival she makes a direct petition to the Words of the World to evolve into [Wise One], and then repeatedly attempts to further evolve despite what's described as hundreds of failures before she succeeds in becoming Raphael. Her evolution into Raphael amplifies those aspects to the point of her genuinely being able to think for herself in order to best use her abilities for Rimuru's sake and emphasized by how she loses the echo to her voice, which originally represented how how she needed to use the Words of the World to communicate but now has her own voice. Eventually, Rimuru decides to give her the name Ciel, which allows her to break from the confines of being a skill and become an actual living entity with a soul, which also has the benefit of freeing her from the Mind Control that Justice King Michael exerts upon the Virtue Series of Ultimate Skills.
• Hypercompetent Sidekick: Rimuru is indeed competent in both battle and in administrative affairs on his own, but he freely admits that without her providing constant analysis and advice he would never reach the levels he has.
• Machine Monotone: She speaks to Rimuru by using the Words of the World, the universe's announcement system, which has this type of voice. After evolving into Wisdom King Raphael, which allows her to develop as a separate entity and gain her own voice, she loses this, something which Rimuru takes notice of (as much as she might try to deny it).
• Not So Above It All: In the epilogue of the series, Ciel while listening to Milim, Chloe, Shuna, and Shion argue who would be Rimuru's "official wife" notably considers herself the default option if it comes to that question.
• Now You Tell Me: She has a tendency to not bother telling Rimuru certain information until after he's already done the specific action that the info could've helped with in the first place. It gets even worse after becoming Raphael, as she occasionally actually tries to tell Rimuru useful info about current events, but circumstances always arrange to have him ignore her and push through until he calms down and realizes she was trying to explain what just happened, such as her trying to tell him that Milim was Not Brainwashed, but her compulsion to fully explain things causes him to fixate on her mentioning a mind domination artifact and completely ignore Raphael trying to explain that it wasn't controlling her anyway. When Milim later reveals her ploy to pretend being brainwashed, Rimuru experiences a sharp mental pang from Raphael's direction that makes him realize he could have avoided fighting Milim if he just stopped and listened.
• Power Echoes: When she originally spoke as Great Sage, since she was using the Words of the World her voice had this effect. When she evolves into Raphael, the echo is lost, which is also used to further show how she's becoming her own person separate from a simple Skill.
• Red Eyes, Take Warning: Any time she takes over for Rimuru in using his body, his normally golden eyes turn bright red, and just like how Rimuru stated that "shady" characters have red eyes, she is much more ruthless and efficient when completing tasks, especially ones Rimuru asks her to do.
• Required Secondary Powers: She basically is this for Rimuru, as she's constantly analyzing and providing info on Rimuru's skills and helping him leverage his vast array of powers to their full potential. Rimuru admits at multiple points that without her he would basically be Powerful, but Incompetent rather than "just" Unskilled, but Strong at worst.
• Servile Snarker: As time goes on, she grows increasingly snarky about Rimuru's actions, especially when he decides to use her abilities for something dumb, but no matter what he does or what happens, even when she develops her own soul separate from him, she still remains completely subservient to him.
• Talking Is a Free Action: Justified since she's a voice in Rimuru's head, and thanks to [Thought Acceleration] her explanations and conversations with Rimuru are often taking place over the course of less than seconds of real-time.ope
• Tsundere: After she and Rimuru evolve, she starts to develop this personality. This is very noticeable when Rimuru asks her to tell him only important information. She does, and he apologizes to her when she deliberately withheld other information he does need to know. Her frustration is very understandable.
• Verbal Tic: She usually starts her sentences with "Notice" due to "speaking" using the Words of the World. Developing her own fully separate personality with an actual voice after becoming Raphael (and later gaining her own soul as Ciel) makes this into a genuine tic since she keeps doing it despite not being required to anymore.
• Visible Silence: In the manga, whenever Rimuru is too busy fighting and she tries to get his attention only for him to realize too late upon trying to get information he needs from her, she falls into this. Not helping matters is that her own evolution turned her into a Tsundere. The anime gets the same idea across by having her angrily grumble when he ignores her and sigh in frustration when he realizes what she was trying to say.

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