Fairy - Doublies' tail holds the “power of light” that is a source for their power and emotions. They are hunted by Inasis from Skeltranian specie, that are eating light. But that's not the only reason why they eat fairies. They eat them because they hold a grudge against them.

Why?

That is something only Inasis know, some people say that they are doing it for their queen, goodness Astra, that is no longer alive. Since Fairy - Doublies look similar to Astra, Inasis think it has to do something with Astra's death.

However, that is not where it ends. Fairy - Doublies are too strong with their “power of light” so once Inasis eats them, they sacrifice this power to save themselves. Since this power is abnormally strong, it turns Inasis into a Lux! Fairies without power are weak and no longer radiate light or glow. They are then trying to live as an average Doublie, but with no power. Some Doublies take care of them, some of them are scared and run away.