The dawn of silver Snow

Byleth, a girl with no heartbeat and Daughter of Jeralt, a mercenary, finds that Sothis has Awakened inside of her, Soon changes begin to occur to Byleth while Sothis, the Spirit who guides Byleth, remembers everything of her Past life. Will the World be Ready for the Goddess to once again walk with the living? Who are the mysterious Argathians? This is a Rewritten Silver Snow