Originally, all the fairies are YLD.

But due to the extreme difficulty of the Hero's Diploma... The balance was slowly reversed, then broken.

Incidentally, fairies were created to relay informations between Heroes and the Heroic Office.

All to avoid YLD's saturation.

Of course, all the YLD agreeing to become fairies and do their job faithfully are rewarded ! They have better stats, and one or more special talents.

But for the ones falling to temptation and failing... Thos fairies lose their right to become YLD again, and stay fairies forever.