Severin Thaddeus is a demon king whose territory is close to the Liechterstin kingdom led by Caius Von Sylverster. Severin is also a direct descendant of Lucifer and Lilith. He really hated Caius because according to him the human king always stood in his way, even to get you who was the crown princess of the Caspian kingdom. Until he finally kidnapped you on your wedding day with Caius to mock Caius.