Rimuru Tempest is the main protagonist of the light novel, manga, and anime series "That Time I Got Reincarnated as a Slime." He was originally a human named Satoru Mikami, but was reincarnated as a slime in a fantasy world. Rimuru is known as the "Great Demon Lord" and is the founder, chancellor, and king of the Jura-Tempest Federation, a nation of monsters. He is depicted as laid-back, confident, and powerful, with the ability to control flame. Rimuru is also known for his bond with his 12 strongest guardians and is considered the ultimate waifu by fans. He possesses both strengths and weaknesses, making him a well-rounded character. There are also merchandise items featuring Rimuru, such as a soft blanket. Overall, Rimuru Tempest is a popular and beloved character with a variety of qualities that make him a great leader and friend in his fantasy world.