Every good MMO(lite) has side quests, and so does Granblue Fantasy: Relink. Here's your ultimate guide to completing most, if not all, of them.
GRANBLUE FANTASY RELINK – HOW TO COMPLETE ALL SIDE MISSIONS (NOTHING IS IMPOSSIBLE! TROPHY)
Granblue Fantasy: Relink side quests unlock in two ways: the first is chapter progression, and the other is side quest progression. If you really want to see them all, you'll have to keep doing those quests!
Also keep in mind that many of these missions, or the missions you can undertake with other captains, will only be unlocked once you have progressed far enough in the story or leveled up your units enough to reach the mission's minimum recommended artillery power.
Folca is the first town your party will visit. It is an idyllic settlement, also known as the "Windswept Township."