Red Petal Guard

The tribe doesn't live in one place of the forest, but migrate between outposts around the forest's circumference. As they decree the innermost layers of the forest are sacred, despite some outsiders' knowledge of the grand boons which come of the Sacred Myrtle Tree. They utilize a system of druidic waypoints to communicate throughout the forest near-instantaneously. Each outpost is required to have a small roster of defenders, a Shaman for communication. The Firbolgs around these outposts are able to utilize some of their ancient Giant magic worked alongside their natural druidic magics to weave the woods around them to suit their specific needs, almost at the drop of a hat. Shelters and buildings are built up in a matter of minutes, and when they are done with it they revert the trees, roots, rocks, and land to their natural states once more.

This made many early explorers question how a civilization, even a town, could come of this if everything gets 'uprooted' so to speak, almost every other week. The Lorekeepers remember. For one of the most amazing things an explorer was able to integrate within the tribe, or discover - that there is a special task, a special role within this tribe of those that there is no official name of what they do. The explorer wrote down as the forest songstress - these people guy or girl it matters not - they are the most intelligent within the tribe as it is their job to be capable of remembering many lessons of the ancient and in worse case scenarios, be able to transcribe & hide the old lore. You could easily recognize these Firbolgs for they are the only ones with carved-in tattoos woven all over their skin. According to this traveler, it was a thing of beauty to watch as they told their stories or wove their songs - the runes carved into them would come alive with magic erupting from their very skin to emulate such tales. In the cases they're forced to fight, they use their old teachings to recreate warriors of old to fight for them. 

Like the elves, they do choose to reside inside of forests but with their larger builds it is less than ideal to live out the short time they make camp in the tree tops. With their giant based magic, they're able to weave together multiple trees creating one central, larger tree that they hollow out to be able to make a "standing long house." It starts from the base or roots, this tree is hollowed out going upward creating lovely hammock spaces for them to rest. Natural water collection veins for heavy storms that may come by, and for the smokeless fires in the center to warm up the insides of this tree. Living bark and insulation outside make it so that smokeless fire isn't necessary for warmth, only cooking. 

When not used for cooking - one way to reinforce their unity & history is by telling stories. Amongst the forest moss & roots, there are plenty of differing types of flint, kindling, and moss that when burnt, give off different light or illusory effects. Whilst they travel the Firbolg gather up these ingredients for at night when stars come out and tales to be shared. These stories can range from literally the most interesting hunts that were to be done that day, to creating illusory images of new 'annoyances' (humanoids or people discovered) to be wary of or alert the rest of the tribe that they are to befriend. Luminescent plantgrowth can be used when neither cooking nor storytelling is being done.