Of the various existingisekai anime series,That Time I Got Reincarnated as a Slimehas managed to set itself apart from its counterparts with its attention to detail andunique world-building. The series begins with Satoru Mikami, a former salaryman who is killed and reincarnated into a slime in a world of magic and fairies.
Now namedRimuru Tempest, the slime goes off to explore the world he finds himself in, and he discovers various races that were heard of only in myths and legends. From the Undead to Angels and Demons, each race comes with its own unique attributes.
Updated Jun 02, 2025, by Oluwatokiloba Folami:The world-building and depiction of various races inThat Time I Got Reincarnated as a Slimehave earned the series wide acclaim from many. The detail in the portrayal of every single race intrigues fans who would like to know more about the species present in the show’s world. While there are a variety of races, most species are broadly grouped into monsters, spirits, or spiritual lifeforms. While this does help to broadly categorize the many known races inThat Time I Got Reincarnated as a Slime, the beauty of the many sub-races under this classification remains hidden, but is not to be underestimated.
14Vampires*
With Their Affinity For Darkness, Vampires Rule The Night
In various other media, these night creatures are often depicted as undead beings. However, inThat Time I Got Reincarnated as a Slime, vampires are more Majin than they are undead beings.The vampires portrayed in the seriespossess the normal traits associated with vampires, such as a preference for dark places, shape-shifting, and a nearly eternal lifespan.
Aside from the better-known race of vampires, a special subset of vampires called Overcomers exists. These overcomers are known as such because they have overcome the limitations of having to feed to survive or being unable to bask in the sun. As overcomers, vampires reach the pinnacle of their being.
13Giants
This Race Is Among The Most Physically Gifted
The giant race is one of the more innately gifted races in the series, as they are able to nullify magic. The giant race was created from the godly divine giants, who are said to have been born from the Earth itself.
Most giants typically stand between two and three meters tall. However, while in combat, they are able to grow much larger.As large beings, giants have incredible physical abilities. With their innate ability to nullify magic, most giants are great combatants. As a race, giants are grouped under Majin and possess subspecies, such as giant ogres and cyclops.
12Golems
Can Be Natural Or Artificial
Among the many races portrayed inThat Time I Got Reincarnated As A Slime, golems are among the rarest. Golems are particularly rare because they are made from inorganic materials. Most existing golems are the creations of powerful magicians, rather than actual living creatures.
Despite many golems being creations, they are classified as a subrace because natural golems born from magicules do exist, even if they are extremely rare. For golems, their behavior and function highly depend on their structure, as they do not have a specific form even as natural golems.
11Fairies
Elementals With Material Bodies
In most forms of media, fairies are often depicted as tiny magical creatures; however, that doesn’t always have to be the case, as seen withThat Time I Got Reincarnated as a Slime. In the series, fairies are a sub-race of beingsclassified under spirits alongside angels, demons, and elementals.
Fairies are, in essence, elementals, but with material bodies rather than energy-based bodies. Fairies range from dryads to high elves, high dwarfs, and even pixies. Like most spirits, they have magical powers, and evolved from demihumans and elementals. With their demi-human ancestry, races that can restore their legacy and trace their origins to elementals can become fairies.
10Majin
Intelligent Monsters Capable Of Using Magic
Used as a term for intelligent monsters, the Majin are popularly referred to as magic-born. They are monsters that have undergone some form of transformation or mutation, allowing them to become magical beings.
While most Majin have the ability to reproduce, they usually do not, as their immense power and near-immortal status prevent them from needing offspring to ensure they do not go extinct. There are various subclassifications under the Majin, and one of the most popular is the Demonoid tribe. The tribe is composed of Majin, who were originally humans but had their bodies mutated.
9Undead
These Night Crawlers Live After Death
Under the broad classification of monsters, the legendary Undead monsters also exist. Unlike other forms of monster races, the Undead are types of monsters that lack any form of life force but can still move and act.
Undead monsters are typically demi-spiritual life forms that reside in immortal bodies that have no life. They usually have weak physical strength but are incredibly talented at magic. Unlike other monsters, the Undead are weak against holy magic and sunlight. Because of this, they hardly appear during the day and are known as night crawlers.
8Elementals
Born From Certain Elements
As the name suggests, Elementals are a race of naturally forming spiritual life forms. These beings embody a specific element and come into existence either through a massive gathering of the natural energy of an element or as offshoots born from a higher Elemental.
Most Elementals are capable oftransforming magical energy into their natural energyto be released in the form of the element they embody. Under the elemental race, fairies and dryads like Treyni exist. While they are also considered Elementals, they have incarnated into a physical form, which makes them fairies.
7Magic Beasts
These Wild, Powerful Beasts Are Common In The Series
Most monsters depicted inThat Time I Got Reincarnated as a Slimeare Magic Beasts. This makes them one of the most prominent races in the series. Under the Magic Beasts race, a subcategory called Mystic Beasts also exists.
While these beasts share many similarities with Magic Beasts, they get their nutrition mainly from magicules, while Magic Beasts generally supplement their diet with meat and plants. Magic beasts are further subdivided into various species, ranging from a Black Spider to a Giant Bear to a Giant Bat. This shows the true diversity of the Magic beasts.
6Dragons
Rare, But Among The Most Powerful Of Most Races
The Dragon race is one of the most powerful races portrayed inThat Time I Got Reincarnated as a Slime. The dragons were born from the Elemental Dragon, Veldanava, the Star King Dragon gifted to his daughter. After the death of the Elemental Dragon, its essence spread throughout the world and gave rise to Lesser, Medium, and Arch Dragons that spawn in areas with high magicules concentration.
Lesser dragons are generally referred to as beings such as Wyverns and Basilisks, while Arch Dragons refer to beings such as Sky and Water dragons. True dragons, on the other hand, arethe strongest beingsin existence and serve as the pillars of all creation.
5Sprite
With Sub-Races Like Dwarfs And Elves, The Sprites Are Highly Successful
While many anime and manga series consider Dwarves and Elves to be separate races on their own,That Time I Got Reincarnated as a Slimegroups them under the umbrella term Sprite, alongside Merfolk and Oni (the Fire Spirit people), which includes Goblins and Hobgoblins.
The Sprite race is composed of demi-humans who have longer lifespans and more magical force than regular humans. Among the Sprites, the four primary families can trace their roots back to a certain element. Dwarves—Earth, Merfolk—Water, Oni—Fire, and Elves—Wind.
