Seven years have passed since Link left for Termina. Ganondorf now rules Hyrule unopposed, and Zelda will no longer wait for the Hero of Time to return. With the kingdom on the brink of destruction, Zelda embarks on a journey to awaken the Ancient Sages, the original six wise men who helped unify Hyrule during its Civil War. As she awakens the Sages, Zelda discovers secrets about Hyrule's past that will end up threatening its entire future. With the fate of the world in the balance, Zelda must save Hyrule from the King of Evil and the shadows of the kingdom's dark past. And she would do well to remember those shadows.
I'm angry at myself for not finding this gem of a fanfiction. It checks all the boxes - it has adventure, action, comedy, romance(mc is a bit dense at the beginning but when he figures it out it's worth it) and mystery. All in all a good fire emblem Isekai fanfiction with legend of Zelda elements.