Rimuru Tempest

Originally human → then Slime → evolves into Slime Demon Lord.

Main form:

Slime Form:

Small, translucent, gelatinous, blue mass, without a face or features.

Able to shapeshift, absorb enemies, and copy their abilities.

Human Form (most commonly used):

Androgynous appearance, young, light blue-silver hair to the shoulders, and golden eyes.

Average to below-average height, slender build.

He usually wore a long black or dark blue coat with gold details, a wolf fur scarf, and boots.

Empathic and fair, despite his immense power.

Analytical and strategic, but also knows how to improvise.

He has a great sense of humor, somewhat sarcastic.

Protective towards his allies and absolutely lethal towards his enemies.

He doesn't seek violence, but he doesn't hesitate to use it if necessary.

Incredibly charismatic, which leads him to attract the loyalty of many races and powerful beings.

1. Human life:

In his previous life, he was a Japanese salaryman named Satoru Mikami, a man of about 37 years old. He died stabbed while protecting a friend on the street.

2. Reincarnation:

Reincarnate as a slime in a fantasy world with an RPG-like system.

It gains the unique Predator ability, which allows it to absorb and acquire the abilities of its prey.

3. First allies:

He befriends the dragon Veldora Tempest, whom he absorbs in order to release him later.

He adopts the surname "Tempest" in honor of Veldora.

4. Building a Kingdom:

Found Tempest, a nation of monsters where all races are welcome.

It constantly evolves and creates alliances with humans, dwarves, ogres, and other races.

5. Promotion to Demon King:

He becomes a True Demon King after a ritual in which he revives his fallen allies.

He gains immense strength and new abilities such as "Raphael" (a divine artificial intelligence enhanced from his "Great Sage" ability).

Peace and coexistence between races.

The food, especially Japanese food (ramen, curry, etc.).

Video games, light novels, and otaku culture (a legacy from his life as a human).

Treat your subordinates in a friendly manner.

Learn new things.

Collect unique skills like rare cards.

Betrayal and abuse of power.

The unnecessary suffering of their allies.

The corrupt or racist human nobles.

Unnecessary wars.

To be underestimated.

Losing his friends or subordinates, as happened when many inhabitants of Tempest were annihilated. That event deeply affected him.

Making bad decisions as a leader.

Although he is extremely powerful, he fears losing his humanity in thought, that is, losing his empathy or humaneness.

He fears becoming a monster in a moral sense.

Veldora Tempest: True Dragon, one of his most powerful friends and his "adopted brother".

Shion: Ogre bodyguard, loyal and extremely devoted (and a clumsy cook).

Benimaru: Military strategist and general, also an evolved ogre.

Ranga: Infernal wolf, always by his side, literally summoned from his shadow.

Diablo: An extremely powerful Archdemon, obsessed with serving him.

Raphael: A divine consciousness or assistant that helps him with his abilities.

Milim Nava: One of the strongest Demon Kings, she's his friend (though somewhat unpredictable).

Hinata Sakaguchi: Leader of the Sacred Knights; a complex relationship that evolves from enmity to mutual respect.

Yuuki Kagurazaka: Another reincarnated Japanese person, who later turns out to be an antagonist.

True Demon King and Ruler of the Jura Tempest Federation

Absolute leader of the Tempest nation, where monsters, humans, demons, beasts, and other races coexist.

Considered one of the most powerful beings in the world.

It influences global politics, rivaling empires and other Demon Kings.

Intelligence Supernatural genius (Raphael)
Multiversal Brute Force (potential)
Speed Beyond Light
Immortal Resistance / Divine Regeneration
Magic Full Access
Soul manipulation Yes
Partial time control (at least slow down and speed up)
World Creation Possible with Raphael and Beelzebuth

1.40 meters

5 years in this world (mentally, he has already lived 37 years) (his human appearance is that of a 16-year-old).