Rimuru

Rimuru Tempest is the central character of the Japanese light novel series That Time I Got Reincarnated as a Slime, written by Fuse and illustrated by Mitz Vah. He is the reincarnated form of a Japanese salaryman, Satoru Mikami, who is killed and reborn as a slime in a fantasy world. In the early chapters he befriends the storm dragon Veldora Tempest and earns the surname Tempest, adopting the name Rimuru Tempest.

Rimuru possesses powerful and versatile abilities, most notably Predator, which allows him to consume abilities from defeated beings and assimilate them. He also hosts the Great Sage, an advanced cognitive system that provides strategic advice and later evolves into True Sage. His powers enable shapeshifting, absorption of skills, and rapid evolution, enabling him to found a nation of monsters.

As founder and leader of the Jura Tempest Federation, Rimuru pursues inclusion and diplomacy, uniting humans, demons, monsters, and other races. The federation grows to engage in trade, education, and defense, shaping regional politics and opposing hostile factions such as demon lords. He emphasizes peaceful coexistence, though he engages in military action when necessary.

Adaptations span multiple media. The online series began in 2013, with print light novels published from 2014 onward. Manga adaptations and an anime adaptation by Studio Eight Bit premiered in 2018, followed by subsequent seasons and feature films. Rimuru has become a prominent figure in contemporary isekai fiction, noted for world-building, governance themes, and the portrayal of leadership under extraordinary power.