My Vampire System: Erin's Awakening

What if instead of Quinn Talen being the main protagonist, Erin also shared that role. What if Peter became a magic subclass and Layla became an undead? What if Fex was able to join the military school sooner, but Vorden was stuck on his family's island? What if Logan stayed the same despite everyone else swapping roles? In this AU, several characters get roleswapped, causing a series of events to get changed, and for character arcs to go into different directions. To think that it all started because Quinn tried to make an investment. Spoilers for MVS arcs 1-6