An arena packed with beauty queens... I'm scared to go in there.
The Warrior Fairies (or Fairies of Vengeance) are Earth Fairies who live on Tir Nan Og. "Warrior Fairy" is a title given to an Earth Fairy who seeks vengeance against the Wizards of the Black Circle and the humans, or who forms part of the army of Tir Nan Og.
When the Wizards of the Black Circle captured them, they were trapped in Tir Nan Og, waiting for the day when they would be free, to exact their vengeance on their captors as well as the inhabitants of Earth who weakened them by not believing in them and whose actions, like war, intolerance, and deforestation were destroying the world they once protected.
Warrior Fairies wear strapped sandals. Their wings are similar to other Eath Fairies'. Their clothing varies in style for each individual fairy, but their clothing is mainly light green, light blue, and purple. They wield staffs to channel their magic.
In "The Enchanted Island," they are seen emerging from Morgana's castle after Roxy frees the Earth Fairies by inserting the White Circle into a stone pillar. They kneel before Roxy and the Winx, their liberators, but soon become angered at the mention of the Wizards of the Black Circle, and proclaim that they will take vengeance on them. They then follow Morgana and Nebula back into the castle after the Winx refuse to become Warrior Fairies and join the campaign of vengeance against the Wizards of the Black Circle and the human race.