Florian: in the Beginning, Our Mother Flame

The Demon King's son, Ryan, in order to fulfill his promise to the human mother, stabbed a fatal sword in the back when the brave team was attacking the Demon King. Celia, under Kraft's guidance, established the determination and dream of peaceful coexistence between demons and humans. Thousands of years later, "Sister, are we the only ones in modern society?" Lane said to Fulian.