Each "Fairy Tail" monster is an anthropomorphic animal based on a princess from classic fairy tale stories.
All "Fairy Tail" monsters has a book (or a scroll in the case of "Luna") in their tails, adorned by a big ribbon.
Their artworks share a background adorned with a pattern (albeit in different colors for each card) along some bubbles that surrounds the monster.
"Fairy Tail" is a play on the term "Fairy tales" and the word "Tail", referencing the fact that all the members of this series are animals.
|Luna||Fox||The Tale of the Bamboo Cutter|
So far, Fairy Tails have effects that allows to disrupt opponent's plays along with effects that helps to swarm the field and search cards.
Rella - Prevents other monsters from being targeted by Spell cards and equips herself an Equip Spell Card from hand, deck or graveyard.
Luna - Returns an opponent's monster to the hand during either player's turn and searches another monster when she is normal summoned.
Sleeper - Flip monster that special summons a monster from your hand, and allows to change an opponent's normal Spell/Trap effect.
Snow - Flips an opponent's monster face-down upon normal/special summon, and allows herself to be special summoned from the graveyard during either player's turn.