A Matched Pair

Byleth has tried many times to save the people she cares about, but something always goes wrong in every lifetime to prevent her from succeeding. Despite this, she has gotten pretty good at navigating life at Garreg Mach, to the point where nothing phases her. As she readies herself for yet another try, Fate throws her a curveball - a fraternal twin who was raised at Garreg Mach.