Fairy

The Fairy (, Fearī) are the race ranked 9th of the Exceed. According to Light Novel Volume 5, they (or at least some of them) are currently imprisoned by the Elves and are being harnessed for their magical abilities

If they were freed from Elven Gard it would be equivalent to the elves selling their national secrets to another race and in the most likely scenario the elves would lose their territory on the Andelusia continent to the Dwarf who they had been quarrelling about it for millennia.

Strengths
During the Great War their respective "Trump card" was called Sprite Tune not much is known about it.

History
The fairies during the Great War allied with the Elves in order for both races to develop magic capable of controlling the 'life' Ixseed races. However when their experimental subject Insein Nebia a Phantasma escaped the Flugel intervened and slaughtered the 2 fairy developers who helped in completing the Áka Si Anse as well as attacking the fairy villages in the exposed 'realm of space'

Despite having their two developers in the Áka Si Anse killed the fairy still had their 'trump card' Sprite Tune.