Rimuru Tempest

"Great Demon Lord" Rimuru Tempest ["大魔王" リムル・テンペスト, "Dai Maou" Rimuru Tenpesuto], formerly known as Mikami Satoru (三条 悟), is the main protagonist of Tensei Shitara Slime Datta Ken. He is the founder and King of the monster country Tempest of the Great Jura Forest and is regarded as one of the strongest Demon Lords among the Mighty Eight Star Demon Lords as well as the only known Great Demon Lord currently. He is also a partner and best friend of True Dragon Veldora Tempest.

He is also known as Sensei to his former students.

Personality
He has a carefree personality. After becoming a king and experiencing the reality of his close friend's death, his naïve nature decreased. Unlike most other shounen MC, he has no problem with decimating any forces who dares to harm his subordinates and country, regardless of their numbers. As he progressed through the year, his thinking has become more like a True Demon Lord.

Rimuru also tends to "overeact" when there's danger to his close ones, such as his countrymen, subordinates, friends and students.

Appearance
Rimuru appears initially as a pure blue bodied slime, but upon becoming a Demon Slime, he is silver with streaks of gold. His mass has grown over time, accommodating larger human forms. initially, he only had enough mass to appear as a child normally, but by the time he became an Ultimate Slime, he had enough mass to appear as a 16 year old teen.

Fusion
He can use fire state in his slime form. Upon activating that skill, his aura becomes that of a flame. His facial temperature also raises to over 1400 degrees. It can be used as a weapon. The spider's mimicry gives him white spots. As for centipede's mimicry, he grows fangs. With the lizard, he grows scales. As for the giant bat, he sprouted demon-like wings. As the black wolf, he turned black and grew two horns - horns like those of a unicorn. As a black snake, his body is covered in a gold pattern.

Mimesis: Human
In this form, Rimuru possesses silver hair. There is no visible sex characteristics, however, the features are similar to that of a girl. This is probably because the original body was Shizue Izawa's. His gender is nowhere to be seen, but there are dangerously cute features.

This form doesn’t use black fog, because the slime body is equal in mass to the mass of the body formed. There is no discomfort. Also, because there's no need for black fog, there is no need to consume magic power.

Due to the fact that there are limbs now, there are improvements in motor abilities, but the body originally was that of a child though It’s still easier to move than slime. It is also possible for the mimicry to become adult using the black fog.

This form has no excretion and reproductive organs, given that there isn’t a need to excrete or reproduce, however, he is free to eat, taste and drink. Since he doesn’t need to breathe, he doesn’t do it even as a human. He could create lungs if he wanted to, but since he doesn’t see a need to, he hasn’t made them. He often wears Shizu's old mask to hide his demonic power.

In his human form, he wears a black fur coat and is depicted wearing a scarf. Under the coat, he wears the kimono that Shuna had made for him. Underneath that, he wears the pants he previously received as well as a steel thread underwear.

Since eating the Orc Disaster, his human form grew a bit. He was no longer a child, but a young human body that still retains a facial image resembling that of a girl. In that form,he is around 150 cm in height. In addition, he obtained a devil transformation form.

Upon becoming a True Demon Lord, and having his race change to Demon Slime, Rimuru has been depicted wearing a black overcoat, his nails also appear sharper and his overall human form appears slightly older.

Upon evolving further into an Ultimate Slime, Rimuru's human form looks like a 16-17 year old. This form is described by Velgurind as appearing genderless, as it was unclothed upon generation, but has dangerously cute features to it. By simply willing it, Rimuru can generate clothes from his own mass and magic power in this form.

Abilities
Using Great Sage, he can quickly read a book by copying it completely. Simultaneous utilization of Great Sage and Gluttony allow the high speed copy and review of the magic books that he holds in his hands. With that, he can postpone checking the content of the book for a later time. Unfortunately, it is not possible to be able to use magic just by copying the books. But, taking and copying it, he’s able to make the index of the magic books that he wants. After this, it’s necessary for him to study them one by one. Taking that into consideration, it can be said that Rimuru holds a great amount of knowledge regarding magic as well as being speculated to be able to use most of the magic in those books, if not all of them.

After evolving into a Demon Slime, the ability to freely change between material and spiritual bodies was added. As the result of the evolution, his total magical energy greatly increased. Compared to the original amount, it was ten times as large.

He can use skills that don’t rely on magical energy such as raising his abilities using fighting spirit technique with Herculean Strength in addition.

Thanks to Hakurou’s guidance, his skills with the sword was improved.

He was able to analyze the Summoning Magic he first saw during the adventurer exam and acquired the skill to use them.

After fighting the Guardian of the Labyrinth, Rimuru has the ability to create golems. The abilities of the Golem can be added through the possession a spirit or a demon as Rimuru made them inhabit the Golem. The outward appearance of the golem is created according to his imagination.

Using Manas: Ciel, Rimuru can copy space manipulation techniques simply by seeing it, such as when he copied the Unique Skill Restrainer which belonged to Gozurl. Like this, Rimuru can also copy practically any other Skill or Magic as long as he has seem it.

After the fight with Yuuki, Rimuru gained the ability to use [Instantaneous Movement] which lets him travel across Space-Time at will. Using this ability, Rimuru was able to travel to his old world where he saved his past self Mikami Satoru from death. He was also able to return from the place beyond time where he was exiled to by Yuuki. The ability as described is the ability to reach the desired point instantly across space and time.

Magic

 * True Dragon Species Magic
 * Upper tier Spirit Summoning
 * Upper tier Demon Summoning
 * Nuclear Strike Magic
 * Thought Battle Magic
 * Physics Magic
 * Flight Magic
 * Cleaning Magic: He learned it from Ellen. When he uses it, his magic amplifies the effects of the spell, cleaning everyone in the vicinity.
 * Magic Energy Manipulation Archive
 * Original Magic

Species Skill

 * Decomposition Absorption
 * Endless Regeneration

Manas

 * Manas: Ciel (God's Wisdom Core) [ Wisdom Lord Raphael's core that obtained individuality.]
 * Thought Acceleration
 * Analysis expert
 * Parallel processing
 * Fusion
 * Separation
 * Chant Annulment
 * All of creation
 * Food chain, etc and Harem Skill

Ultimate Skills

 * Void God Azathoth
 * Soul Consumption
 * Turn Null (Nothingness collapse)
 * Imaginary Room
 * Space Time Control
 * Multidimensional Barrier
 * True Dragon Release
 * True Dragon Core Transformation
 * Multi-existence (obtain after analyzing Evil Dragon Lord Azi Dahaka)


 * Harvest Lord Shub Niggurath
 * Skill Creation
 * Skill Duplication
 * Skill Gifting
 * Skill Bank
 * Evil Dragon Lord Azi Dahaka (obtained after devouring Footman)

Former Ultimate Skills

 * Gluttonous King Beelzebuth (Synthesized to create Void God Azathoth)
 * Predation
 * Analysis
 * Stomach
 * Mimicry
 * Decomposition
 * Supply
 * All of creation
 * Food Chain
 * Soul Eater
 * Wisdom Lord Raphael (Synthesized to create Void God Azathoth)
 * Thought acceleration
 * Appraisal
 * Parallel processing/Analysis
 * Chant Annulment
 * Fusion
 * Separation
 * All of creation
 * Though: Analysis and Judgement


 * Storm King Veldora (Synthesized to create Void God Azathoth)
 * Storm Dragon Summon
 * Storm Dragon Release
 * Storm Dragon Magic Archive
 * Bladed Storm: Crystalization
 * Scorch King Velgrynd (Synthesized to create Void God Azathoth)
 * Scorch Dragon Summon
 * Scorch Dragon Release
 * Scorch Dragon Magic Archive
 * Bladed Flame(Scorch): Crystalization?


 * Covenant King Uriel (disappeared after creating Harvest Lord Shub Niggurath and Void God Azathoth)
 * Spatial Domination
 * Defense Barrier
 * Infinite Prison
 * Seclude Space

Unique Skills

 * Traveler
 * Puppeteer

Former Unique Skills

 * Great Sage (evolved into ultimate skill Wisdom Lord Raphael)
 * Predator (evolved into Gluttony after absorbing Starving Ones)
 * Gluttony (integrated with unique skill Heartless One then evolved into ultimate skill Gluttonous King Beelzebuth)
 * Heartless Ones (integrated with unique skill Gluttony then evolved into ultimate skill Gluttonous King Beelzebuth)
 * Endless Prison (evolved into ultimate skill Covenant King Uriel)
 * Shapeshifter(integrated with unique skill Great Sage then evolved into ultimate skill Wisdom Lord Raphael)

Extra Skills

 * Sage (evolved into unique skill Great Sage)
 * Water Manipulation
 * Segmenting (disappeared)
 * Black Flame (disappeared)
 * Black Lightning (disappeared)
 * Barrier (evolved into Multiple Barrier)
 * Shadow Step (evolved into Spatial Transfer)
 * Spatial Transfer
 * Multiple Barrier (become irrelevant and disappeared after gain Ultimate Skill)
 * Magic Perception (disappeared after gaining Universal Perception)

Daily Skills

 * Universal Perception
 * Universal Body Transformation
 * Great Demon Lord's Haki

Battle Skills

 * Thread Manipulation
 * Cloning: For Rimuru, the Cloning skill is only limited as far as his Unique skills allow.
 * First, Great Sage: As long as the user is within a kilometer radius, a clone can be created. Should he go beyond that limit, his consciousness link with the clone will be severed, and the clone can only respond to basic commands. Since vision is always shared, and an order can be changed at any time, the clone can be used for long range reconnaissance missions.
 * Second, Predator. The stomach can only release the true body. A clone can be predated and stored, but cannot be extracted. However, feedback regarding skills, etc. can be acquired.
 * Third, Shapeshifter: Only one fusion is allowed while division is unchanged.
 * Chaos Breath
 * Law Manipulation
 * Element Alteration
 * Telepathy Control
 * Demon Lord Transformation
 * Future Attack Prediction (Clairvoyance)
 * Holy Sword Technique: Melt Slash
 * Hydraulic Propulsion (evolves into Extra Skill Water Manipulation)
 * Water Current Control (evolves into Extra Skill Water Manipulation)
 * Water Blade (evolves into Extra Skill Water Manipulation)

Mimic/Mimesis

 * Human
 * Demon
 * Spirit
 * Flame Giant
 * Acquired Skills: Clone, Fire State (Flame Change), Area Boundary
 * Star Wolf
 * Acquired Skills: Supreme Sense of Smell, Telepathic Communication, Intimidation, Shadow Step, Black Lightning
 * Black Serpent
 * Acquired Skills: Heat Detection, Noxious Breath
 * Lizard
 * Acquired Skill: Body Armor
 * Giant Spider
 * Acquired Skills: Sticky Thread, Steel Threat
 * Giant Bat
 * Acquired Skill: Ultrasound Waves
 * Centipede
 * Acquired Skill: Paralysis Breath
 * Goblin
 * Orc

When a certain amount of damage accumulates, the mimicry wears off. Afterwards, there is no damage transfers to his slime body. Because the skill Mimesis utilizes Magic Essence to create a new body, the main body cannot be damaged. There are two restrictions on this skill. After Mimesis wears off, he is unable to transform for the next 3 minutes, and the other was that mimicking a demon/monster required a certain amount of magic essence. The amount of magic essence required is relatively insignificant, hence, it is not an issue, and there is no duration limit to the skill. The reason for black fog when mimicking into monsters is to compensate for the missing parts.

Resistances

 * Physical Attack Nullification
 * Natural Elements Nullification
 * Abnormal Status Nullification
 * Mental Attack Nullification
 * Hybrid Attack Resistance

Equipment
A magic mask left by Shizue Izawa. As it's name implies, it suppress demonic power. It also serves as a treasured memento of Shizue, as it is the only remaining possession of Shizue which Rimuru possesses. He received dark leather guards from Garm. It is made of glossy linen - first-class silk that feels wonderful to the touch. Putting the silk to his body, it immediately changes size to fit him. After mixing with his magic, it became as if a part of his body. Even in his adult form, the clothing grows appropriately. This clothing absorbs the aura of its wearer, and can change its appearance. Rimuru’s clothing turned jet black to match his aura. Even if this clothing rips, as long as it absorbs his magical energy, it can repair itself. The materials used came from the previous Fanged Wolf leader. But, due to the wolf clan’s evolution, the fur had turned black. As an extra bonus, it seems that the fur had quite some magical energy stored in it. It has tremendous defense power. This attire happened to have become a magic item. It will always perfectly fit the one who wears it. In other words, even if Rimuru turns into his adult version, the clothing won’t rip. Rimuru equipped with a demon sword a Magic Swords a high-purity Demon Steel weapons inserted with high-purity magic stones/gems he created a sword using Bladed Storm Crystalization and Bladed Flame(Scorch): Crystalization from Void God Azathoth call the sword of tempest.
 * Anti-demon Mask
 * Dark Leather Guards
 * Kimono
 * Wolf Outerwear
 * Swords

Relationships
Rimuru/Tempest relationships|Tempest Rimuru/Human Heroes Dragons Other relationships|Heros & Dragons Rimuru/Relationships Kingdoms/Kings/Queens etc...|Royalty & Kingdoms Rimuru/Demon Lords Relationships|Demon Lords Rimuru/Enemies relationships

Trivia
In Manga and Light Novel Rimuru's personality is a kind hearted, naive and Pervert.

She along w/ Shuna and Shion are voted as the three major idols of the monster country, Tempest.