WN/Rimuru Tempest

"To everyone who went against us, we will bare our fangs and retaliate. To everyone who lends their hands to us, we will grant our blessing to them. To our opponents, we will do to them what they have done to us. In the future, I hope that we can be linked in a friendship one day."

- Rimuru

Great Demon Lord Rimuru Tempest「"大魔王" リムル・テンペスト, "dai maō" rimuru tenpesuto」, formerly known as Satoru Mikami, is the main protagonist of Tensei Shitara Slime Datta Ken.

Slime
Rimuru initially appears as a white-bodied slime, but upon becoming a Demon Slime, it becomes silver with streaks of gold–later purple after becoming an Ultimate Slime–.

It'a mass grew over time, allowing Rimuru to accommodate larger mimicry forms without using extra magicules to compensate for the additional mass. Towards the beginning of the story, Rimuru only has enough mass to appear as a human child, but by the time of becoming an Ultimate Slime, it has enough mass to appear as an adult.

Mimicry: Human
In this form, Rimuru possesses silver hair. There are no visible sex characteristics; however, they are often mistaken for a young girl.

Unlike Rimuru's other mimics, the hair changes color to one similar to that of their original slime body.

After eating the Orc Disaster, Rimuru's human form grew a bit, now the form of a pre-teen with feminine features. In this form, he is around 135 centimeter in height.

Upon becoming a Demon Lord and Demon Slime, Rimuru has been depicted wearing a black Kimono. Their nails also appear sharper and overall the human form appears slightly older.

Upon evolving further into an Ultimate Slime, Rimuru's human form ages to that of a 16 to 17-year old. This form is described by Velgrynd as appearing genderless (as she saw it nude upon creation) but with dangerously cute features.

Personality
Rimuru has a kind heart and a quirky personality. Even though they are quite laid back and want to avoid troublesome situations as much as possible, they actually work very diligently when there is a task needed to be taken care of.

With the heart of a hardworking salaryman and a beloved senior co-worker, Rimuru has a hard time rejecting someone if they plead for help, often ending up with more work than they can handle, which their boss from their previous life used to reprimand them for.

Rimuru tends to react very severely when there's a danger to those close to them, such as countrymen, subordinates, good friends, and students. One might say they overreact to these cases, but it simply shows how deeply they care for them, as a stark contrast with their usual cheerful self.

Unlike many other shounen protagonists, Rimuru has no problems with decimating any forces who dare to harm thejr subordinates and country, regardless of their numbers, knowing full-well about the severity of their actions.