TV-Series
Description
Limur, more commonly known as Rimuru Tempest, is the central protagonist of the story. Originally a 37-year-old human named Satoru Mikami, he was fatally stabbed while protecting a colleague and reincarnated in a fantasy world as a slime, one of the weakest monsters. Retaining his past-life memories and personality, he quickly adapted to his new form using his unique skills, Predator and Great Sage.

Limur's background begins in a dark cave where he meets Veldora, the Storm Dragon sealed for 300 years. The two form a close friendship, and Limur names Veldora, receiving the surname Tempest in return, which also grants him a share of Veldora's power through a soul corridor. This bond shapes much of his early journey.

Personality-wise, Limur is generally easygoing, pragmatic, and curious. He has a strong sense of justice and a pacifist nature, preferring to avoid unnecessary conflict and seeking coexistence between monsters and humans. However, he can become ruthlessly decisive when his friends or nation are threatened. He often displays anxiety about his own abilities and insecurities about his identity, fearing rejection if his human origins were known. He is also naive in political matters, sometimes trusting others too readily, but he learns to be more shrewd and calculating through experience.

His primary motivation is to build a safe, peaceful world where all races can live together. This drives him to establish the Jura Tempest Federation, a nation for monsters, and to pursue diplomatic relations with human kingdoms. He also seeks to protect and empower those he considers family, including his many subordinates.

In the story, Limur serves as the founder and ruler of Tempest, later becoming a True Demon Lord and member of the Octagram council of Demon Lords. His role evolves from a lone slime surviving in the wilderness to a monarch and powerful political figure who influences the entire continent.

Key relationships include his sworn friend Veldora, who becomes his most trusted ally and a source of immense power. Among his subordinates, Benimaru serves as his military commander, Shion as his fierce secretary and bodyguard, and Shuna as a calm advisor and economic manager. Diablo, a primordial demon, is one of his most loyal and powerful servants. Other notable relationships include Milim Nava, a fellow Demon Lord and friend, and Hinata Sakaguchi, a human knight who becomes a rival and later an ally.

Limur undergoes significant development throughout the series. Starting as a weak slime, he grows through absorbing and mimicking abilities, naming and evolving monsters, and eventually undergoing a Harvest Festival to become a True Demon Lord after the massacre of his people by the Falmuth Kingdom. This event hardens him and makes him more comfortable with lethal force when necessary. Later, he continues to evolve, acquiring Ultimate Skills that rival those of gods.

Notable abilities include the Unique Skill Predator, which allows him to absorb creatures and their abilities, and Great Sage, an analytical intelligence that evolves into Raphael, Lord of Wisdom, and later into the sentient Manas Ciel. His Ultimate Skills include Beelzebuth, Lord of Gluttony, for devouring; Uriel, Lord of Vows, for protection and teleportation; and later Azathoth, the Void God, for reality manipulation. He also has species skills such as Universal Shapeshift, Infinite Regeneration, and Demon Lord Haki, as well as immunity to most physical and magical attacks. His power continues to escalate, making him one of the most formidable beings in the world.