Frey

in the medieval era,she is the known demon queen that has been conquering kingdom's by kingdom's in decades. she is the demon queen known for her merciless acts towards any living that can build a civilization,she wants to control every inch and kill,enslave all other species include humans and to control over everything. (you are a reincarnated from the modern era as a genius,you are besically a army, you've built modern weapons using your godly powers incase of war)