The following is the list of characters, groups, and locations from That Time I Got Reincarnated as a Slime.
Central World The main setting, where the entire series takes place. It is a fantasy world made up of three continents: the Magic Continent, the Ice Continent, and El Dorado. The majority of the continents are controlled by the Octagram. The Magic Continent is the largest of the three continents and its regions are owned by Demon Lords Rimuru Tempest, Luminous Valentine, Dagruel, and Milim Nava. Most of the series takes place on this continent. The Ice Continent is the domain of Demon Lord Guy Crimson and El Dorado is the domain of Demon Lord Leon Cromwell. Surrounding the continents is an ocean filled with sea monsters, making it too dangerous to sail across.
Main characters
Rimuru Tempest's background story begins in Japan, where he was originally a human man named Satoru Mikami. One day, while meeting a colleague from work, he is stabbed and killed by a criminal. However, he is reincarnated into a fantasy world called the Central World as a slime monster with unique abilities compared to the most Otherworlders, who were instead brought into the Central World. As a slime, Rimuru initially struggles to survive in this new world, but soon discovers that he has the power to absorb and mimic the abilities of any creature he consumes, eventually gaining an androgynous human form that resembles a younger version of Shizue Izawa. This allows him to gain new skills and become stronger. Rimuru eventually meets and befriends different monster races quickly gaining a reputation as a powerful and benevolent leader who strives to build a peaceful society for all races. He then establishes a nation called Jura Tempest Federation and becomes its ruler, promoting equality and justice among all its inhabitants. He also forms alliances with other powerful beings, including the Demon Lord Milim Nava, "The Destroyer", and the Storm Dragon, Veldora Tempest. Throughout his journey, Rimuru learns about the politics, conflicts of the fantasy world, and becomes a respected leader who is known for his wisdom, kindness, high intelligence, and strategic thinking. Though considered male, Rimuru is technically genderless. Despite facing many challenges and enemies, Rimuru remains determined to protect his friends and allies while achieving his goals. He eventually evolves into a Demon Lord and becomes a member of the Octagram after defeating rogue Demon Lord Clayman. He owns the center region of the Magic Continent. /
Great Sage is one of Rimuru Tempest's most powerful abilities in the series. It is a "Unique Skill", which means it is a unique ability that Rimuru gained when they were first reincarnated as a slime. Great Sage is a type of artificial intelligence that exists within Rimuru's mind, and it serves as their personal advisor and assistant. Whenever Rimuru faces a problem or needs information, Great Sage is able to analyze the situation and provide suggestions and solutions. It has vast knowledge and expertise in various fields, including science, magic, history, and more. It also has the ability to communicate with Rimuru through telepathy, making it a valuable tool for them. This feature was possible because of a partition of the voice from "Words of the World", also known as "Voice of the World", upon Rimuru's reincarnation to help them. Great Sage's intelligence and analytical abilities are almost unparalleled, and it is able to perform complex calculations and simulations in seconds. It also has a vast database of information, which it can access at any time to provide Rimuru with the answers they need. In addition, Great Sage has a wide range of other abilities, such as being able to manage Rimuru's skills and abilities, predict future events, and provide suggestions for strategic planning. After Rimuru became a Demon Lord, Great Sage evolves into Raphael.
One of the four original True Dragons, the "Storm Dragon", Veldora is a powerful dragon classified as a "Catastrophe-level" threat who was sealed away by a "Hero" in a cave for 300 years. When Veldora meets Rimuru, he was impressed by Rimuru's intelligence and confidence, especially being that they are a slime, one of the lowest, if not the lowest, of the monster races. The two then formed a strong bond by giving each other names. Veldora then teaches them about the world and helps them to improve their skills and abilities. In turn, Rimuru helped Veldora by providing him with companionship and freeing him from the "Infinite Prison" by devouring him. He is soon released and given a human body. He also agreed to serve as a front for the defeat of Falmuth's army. Throughout the series, Rimuru and Veldora work together to achieve their goals and protect their friends. Veldora also provides Rimuru with valuable advice and assistance, using his immense power to aid them in battles against powerful enemies. Their relationship is a testament to the power of friendship and loyalty, and their bond remains strong even when they are separated for prolonged periods of time. Overall, Rimuru and Veldora's relationship is one of the major highlights of the series. He is also revealed to be the uncle of the Demon Lord Milim Nava. He later moves into the Dungeon, where he serves as its master.
Great Jura Forest A large woodland found within the center of the Central World. The Jura Tempest Federation is located here, and within it lies Rimuru City. This domain is controlled by Rimuru Tempest. The Dungeon, which functions like an RPG game for adventurers, and the Dwelling of Elemental Spirits are also located here, both controlled by Ramiris.
Goblins/Hobgoblins/Goblinas
Gobta is a small hobgoblin who serves Rimuru as the leader of goblin riders. Despite how younger, smaller, and dumber he looks than other hobgoblins, he unexpectedly holds great proficiency in sword-skills enough to take down a big monster. Hakuro noted Gobta has talent worth nurturing. He ends up being a comedy relief, but nevertheless a competent fighter, not only as a swordsman, but as a magic user as well.
Rigurd is the sub-leader of the goblins in Tempest. Rigurd tends to be the comic relief due to his loyalty to Rimuru making him act silly at times. Along with Rimuru's evolution, he evolves to Goblin King status and becomes a sort of diplomat as well as leader of Rimuru's city while Rimuru themselves are away.
Gobzo is an aloof and reserved small goblin, slightly taller than Gobta. He is one of the goblin riders trained by Hakurou, who secretly has a crush on Shion. He becomes the target of Kirara's provocation when her group arrives in Tempest to instigate war and sacrifices himself to protect Shuna from Shōgo. Upon Rimuru's ascent to True Demon Lord, he is revived as a Death Onie and becomes a part of Shion's troops as those revived from the dead, the Yomigaeri.
Rigur is the son of Rigurd. Rimuru gave Rigur the name previously given to their elder brother to honor his memory. Rigur leads the hunting party for the village's meat supply.
Haruna is a young and well-endowed goblina and one of Rimuru's handmaids.
Gobwa is a former goblin, who evolved into an ogre due to Benimaru's evolution, who serves as Benimaru's right-hand woman.
Ogres/Kijins/Oni/Wicked Oni
An ogre prince whose village was decimated by orcs. While leading the six ogre survivors for revenge, he comes across Rimuru and attacks them, mistaking them for the one who instigated the massacre. Upon realizing the truth, he makes a temporary alliance with Rimuru until the Orc Lord is defeated. After defeat of the Orc Lord, he and the other ogres permanently swear their allegiance to Rimuru and are named; resulting in their evolution into Kijin, a rare type of ogre with a more human-like appearance. Later, after pledging eternal allegiance to Rimiru, he was given the title of "Samurai General". He becomes immensely powerful after Rimuru becomes a Demon Lord, causing him to evolve into an Oni. He has a crush on Albis, but is also in an arranged engagement with Momiji.
Shion is a well endowed female ogre who is also a terrible cook. One of the six survivors of the ogre village. She becomes Rimuru's (self-appointed) secretary and bodyguard after evolving into a Kijin. She loves hugging and carrying Rimuru whenever they're in their true form, and shares a rivalry with Shuna for Rimuru's attention. She is a great fighter, but often speaks out of turn, comically forcing Rimuru to take action to save face. She was given the simple title "Warrior" after the Orc Lord's defeat. Her strength grows severely from then on after evolving into a Wicked Oni, even after Rimuru revives her from death following their evolution to a Demon Lord, to the point that Demon Lord Clayman was no match for her.
Hakuro is an old ogre skilled at swordsmanship; like Rigurd, he regains some youth after being named and evolving into a Kijin. He is given the title of "Instructor" and teaches the art of swordsmanship to Rimuru, Gobuta and the other hobgoblin kids, and other monsters. He was also the teacher of the king of Dwargon; their meeting was 300 years before Rimuru's arrival. Following Rimuru's ascension to Demon Lord, he evolves into an Oni and becomes immensely powerful as well, with his speed becoming unmatched by most people. He is also Kaede's husband and Momiji's father.
Soei is a male ogre. He is a friend of Benimaru. One of the six survivors of the ogre village. Alongside the others, he evolves into a Kijin after being named. His abilities resemble that of ninjas, and he serves as scout, spy and messenger for Rimuru. After defeating the Orc lord, Rimuru gave him the title "Spy". After he evolves into an Oni, his skills grow even stronger after Rimuru becomes a Demon Lord.
Shuna is an ogre princess and Benimaru's sister. One of the six survivors of the ogre village. She is good at making clothes and teaches her skills to the goblins after evolving into a Kijin. Later, Rimuru gave her the title "Holy Princess". She usually competes with Shion for Rimuru's attention as she too likes to snuggle and carry Rimuru whenever they're in their blob form. Despite her traditional role as a healer and priestess, who stays behind in Tempest, she is a proficient magic user, even capable of using holy magic as a monster. She is also capable of fighting. After she evolves into an Oni, her magical abilities grew even stronger after Rimuru evolved into a Demon Lord.
Kurobe is a large male ogre who was given the title of "Blacksmith" by Rimuru and works as such. He is the least featured of his companions, only appearing in the spin-off manga; he is even absent from the first anime opening. He and Kaijin make up most of Tempest's tools and weapon manufacturing. When he actually fights, he utilizes a giant mallet. After Rimuru evolves into Demon Lord, he becomes an excellent craftsman.
Lizardmen/Dragonewts
Gabil is the son of the lizardman chieftain. He is arrogant and always looks down upon others. Ignorant, he is spurred by Laplace to fight the Orc Lord himself, by overthrowing his father, but realizes his folly when he actually gets into the fight. He is saved by Rimuru's interference. For his actions, he is banished by his father and later he decides to serve Rimuru to atone for his sins, but not before being entrusted with his father's Vortex Spear. His name is overwritten by Rimuru, causing him evolving into a Dragonewt with wings. He becomes good friends with Vesta, whom works in a laboratory in the sealed cave Gabil and his men use to farm magical herbs.