There is very little know about this organization and its inner workings. It is composed of powerful Druids. Triana is known to be a high level member who is often used to carry out the orders of the hierarchs. It is assumed that Sapphire and most of the older dragons are also hierarchs. Tarrin by strength of his druidic ability has alos been admitted to the hierarchs, even though he has never "officially" met with them and is considered nearly an outlaw by Fae-da'Nar. It was also mentioned that Sarraya was also considered a hierarch too.
Hierarchs are the law making and enforcement body of Fae-da'Nar.