Rimuru Tempest is the main character of That Time I Got Reincarnated as a Slime, a Japanese light novel series by Fuse that became a manga and a popular anime adaptation in 2018. Originally a human named Satoru Mikami, the character is reborn in a fantasy world as a slime who grows into a powerful leader. Short voice clips of Rimuru spread through anime fandom, edits and soundboards because the character is widely recognised and the cheerful delivery suits memes, reactions and fan videos.