Satoru Mikami died when he was stabbed by a stranger. He was a grown man working for a company in Japan. After his death, he acquired a System called Raphael/Ciel. Reborn into a blue coloured slime. Became a leader in a city called Tempest. Can transform into a long-haired human with blue colour. Has many followers of different races. Is one of the eight Demon Kings in the Octagram. Has a companion named Veldora Tempest, a dragon who can transform into a human.