Rimuru Tempest

Satoru Mikami, a Japanese office worker in his thirties, dies protecting a colleague and wakes up in a parallel world as a lowly slime. Retaining his intelligence and gifted with extraordinary abilities (Predator, later the Great Sage), he befriends the sealed dragon Veldora before setting out to explore this new world under the name Rimuru.

Through his encounters, Rimuru founds the monster nation of Tempest, uniting goblins, ogres, storm wolves and many other races under one banner, aiming for peaceful coexistence between monsters and humans.