Legends of the Sacred Realm
Fairies are the children of the Godess.
They were sent to the world to guard the people assist the good folk in order to keep evil at bay. They have the ability to sacrifise themselves to save the lives of others.
A dead character may be revived to half HP if the fairy chooses to sacrifice itself believing that the world would be a better place without it.
Fairies can be found in special shrines in places where the people are still loyal upholders of good. Because of civilisation rising and falling, some have been forgotten.