Sophia, the sister of Seraph Ingil, was seduced by the demon Keris and was unfortunately killed. The angry Ingil wandered the world for more than 400 years and vowed to find Keris for revenge, otherwise he would never return to heaven. During this period, he adopted the abandoned human baby Carlos...
(I have to admit that this is an adaptation of a whimsical short story from junior high school, and it is still a very vulgar story...)