The "Great Demon Lord" or ''True Great Demon Lord'' Rimuru Tempest, formerly known as Mikami Satoru, is the main protagonist of That Time I Got Reincarnated as a Slime. He is the founder and king of the monster country Tempest of the "Great Forest of Jura" and is regarded as one of the most powerful Demon Lords among the Eight Star Demon Lords, as well as the only currently known Great Demon Lord. He is also an associate and best friend of the "True Dragon" Veldora Tempest.