The God of War and Light swore a pact to guard another the God of Order's daughter for ten years, in exchange for the cure that would revive his wife and child. As a mortal, Orion became Serena's nominal husband, enduring her contempt, her daughter's, and every frame-up from her first love Julian. She believed Julian and locked Orion in a dark cell. When the ten years ended, he left a memory crystal and turned to golden stardust, returning home.
