Fated

A girl named Stefani was chosen to enter the Awakening world. She was found in a forest by Henry, a Dark Mage from Plegia. They immediately became good friends and he took her to the camp, where the rest of the Chrom's army was. There she found a familiar face, her friend Blaze. Stefani told Henry about her love for magic, even if it didn't exist in her world, and he being a mage, decided to teach her the dark arts. How would all of this go?