Royal Fairies are a small set of Fairies that rule over all of the Fairies in the world including the ones that live in the Yosei no Mori. They are considered to be some of the most powerful Light Elemental Spirit Creatures in the world and the Fairy Queen even has a seat on the Council of Light, the ruling body in the Realm of Light. All members of the Royal Fairies, of course, possess the Fairy Element.
The currently Royal Fairies are Queen Mab, King Foster, Eliza Thorne as the Princess of the Fairies, and her younger brother Warren Reaser as the Prince of Fairies.
However there is exists a fifth position within the Royal Fairies that prince and princess nothing about. Even the King is clueless on the position which is called the Fairy Knight.
The Fairy Knight is charged with the protection and safety of Royal Fairies as well as the safety of Fairies all around world. They are blessed with incredible speed, strength, and stamina, a healing factor, and the ability to use the Fairy Element. The current Fairy Knight is James Truesdale, charged with the protection of his girlfriend Eliza Thorne.