"That Time I Got Reincarnated as a Slime" was serialized on the novel submission site "Let's Become a Novelist", became hugely popular, and has since been made into a manga and an anime. The story literally begins with the protagonist being reincarnated as a slime. I would like to take a closer look at the main character, Rimuru.
【That Time I Got Reincarnated as a Slime】The protagonist Rimuru was an office worker before reincarnation
Source: That Time I Got Reincarnated as a Slime © Taiki Kawakami, Fuse, Kodansha / TenSura Production Committee
Before reincarnation, the protagonist was Mikami Satoru (37). He was a virgin working for a major general contractor. One day, while out to dinner with his junior colleague Tamura and the company's Madonna, who is engaged to him, to discuss Tamura's marriage, he is stabbed to death by a random assailant.
Skills acquired on the verge of death in this world
Mikami, who was a virgin until he died, told his lower body that if he was reborn next time, he would at least eat as much as he could, and gained the unique skill "Predator". He thought that he could have become a sage by remaining a virgin until he was almost 40 years old, and even a great sage if he had persisted, and after gaining the extra skill "Sage", he evolved into the unique skill "Great Sage".
【That Time I Got Reincarnated as a Slime】The protagonist Rimuru and the Storm Dragon Veldora
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha/Tenseura Production Committee
The first person Rimuru spoke to after being reincarnated as a slime was the natural disaster-class monster Storm Dragon Veldora. He is the youngest of the dragon species, of which there are only four in the world, and he taught him "Magic Sense" using magical energy. He was sealed away 300 years ago by the Hero's unique skills "Absolute Severance" and "Infinite Prison", but it seems he doesn't dislike humans. In order to analyze "Infinite Prison", he agrees to enter Rimuru's stomach as "Predator". At this time, they give each other names, with the Storm Dragon named Veldora Tempest and the protagonist named Rimuru Tempest. Incidentally, after the Great Sage finishes analyzing "Infinite Prison", the resurrected Veldora is also able to take on a human form.
【That Time I Got Reincarnated as a Slime】The protagonist Rimuru and Shizue Izawa
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha/Tenseura Production Committee
Shizue Izawa is a hero of the Freedom Association and was summoned by the Demon Lord Leon Cromwell. It was during the Tokyo Air Raid. He is a spirit user who was assimilated with Ifrit by the Demon Lord. When Shizu met Rimuru, she opened up to him because Rimuru told her "You're not a bad slime," a phrase that her student and reincarnated student, Yuuki, had taught her. However, Shizu, who looked young but was mentally old and feeble, was controlled by Ifrit and ended up fighting Rimuru. Shizu was able to capture Ifrit, a top-ranking fire-type spirit, as a predator, but her body, having assimilated him, began to age rapidly. In the end, she asked to be eaten by Rimuru, wanting to sleep in his hometown, and he did. During this battle, Shizu learned the unique skill "Transformer," which allowed her to integrate her own skills. Having eaten Shizu, she was also able to mimic humanoid form.
【That Time I Got Reincarnated as a Slime】The main characters Rimuru and Gerudo
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha/Tenseura Production Committee
The unique skill "Predator" that he gained when he was reincarnated is the ability to eat anything, and he can obtain this skill by preying on and analyzing the target. At one point, the orc army is used to create a new demon lord, centered around the demon lord Clayman. To save his clan from starvation, the orc leader Gerudo takes advantage of the schemes of Gelmud, a subordinate of the Demon Lord, and confronts Rimuru and his friends with his unique skill "Starving." By eating Gelmud, Gerudo evolves into a pig-headed Demon Lord, but is eventually eaten by Rimuru as a "Predator." This causes the "Predator" to evolve into a "Glutton." This also causes Rimuru to become the leader of the Jura Forest Divination Alliance.
【That Time I Got Reincarnated as a Slime】The protagonist Rimuru and the Demon Lord Milim
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha/Tenseura Production Committee
Milim, a natural disaster class demon lord who looks the most human but is said to be the most cunning. After defeating Orc Lord, Milim comes to Rimuru. By feeding her honey, the two quickly become best friends. Milim often invites Rimuru to become a Demon Lord, but he refuses. The reason he became a Demon Lord was because he was angry at the death of his pet, so he wiped out his country and hundreds of thousands of its citizens, and then evolved into a Demon Lord in grief over the death of his pet. Milim, who is said to be the strongest, uses Dragon Knuckles, which have the effect of reducing fighting power, given to her by Rimuru, and she even brought Demon Lord Karion to the brink of death with one blow. As her father was the Star King Dragon, the first dragon species, she may have felt a closeness to Rimuru, who preyed on Veldora. Milim has "Dragon Eyes" and can measure the magical energy of others just by looking at them.
【That Time I Got Reincarnated as a Slime】Why the main character Rimuru became a demon lord
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha/Tenseura Production Committee
While Rimuru was fighting Hinata (Shizu's student), Tempest was attacked by the Farmas Kingdom. In the attack, several villagers, including Shion, were killed. Rimuru is painfully aware of the naivety of his thinking, but he learns that there is a possibility of resurrecting the dead. However, to do this he must evolve into a Demon Lord, and to become one 10,000 sacrifices are required. To do so, he annihilates the 15,000 soldiers that attacked the city. After that, after becoming a Demon Lord, Rimuru revives Shion using the Resurrection of the Dead. By integrating the "Heartless" he gained as he evolved into a Demon Lord, the "Gluttony" evolves into the "Gluttony King".
【That Time I Got Reincarnated as a Slime】Summary of the main character Rimuru Finally
Source: That Time I Got Reincarnated as a Slime ©Taiki Kawakami, Fuse, Kodansha / TenSura Production Committee
Rimuru gets stronger and stronger every time he fights a new enemy. He will probably continue to gain new skills. It's an increasingly exciting development. New forces have also appeared, and it is still unclear what kind of relationships they will build. I'm looking forward to the anime as well!
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