Almost immediately after Byleth and Hapi had celebrated their marriage in a lively ceremony, the battle against those who slither in the dark began in earnest. Contrary to expectations, Hapi wholeheartedly charged to the front lines and fought alongside her husband until true peace came to Fodlan. Afterward, the couple vanished without a trace-at least until someone claiming to be a descendant produced a chronicle of their lives. According to that account, the pair had retired to a secluded village at the foot of the Oghma Mountains. There, the author writes, they pledged their undying love for each other underneath a starry sky.