Diversity of Flins
Since Flin birds are a kind of bird that are found in a unique geological region, they are not bound by some certain characteristics.
They are creatures that are diverse and can be considered as different beings completely if one did not know much about them.
The regions that Flins live in, that particular geological region, are protected places all over the world.
And in this world, these little birds are considered an important part of various individuals' daily lives.
The people that tame them and train them are not that rare, however, they are highly trained individuals who had to master their craft first before they could start training Flins commercially.
The Central association of Tamers, much like various other organizations, are the ones who provide the tamers who have mastered their craft and training methods of Flins and grant them licenses.