The Fomor'ren are the ancient descendents of the Twilight Court on Xen'drik. They are giants, cursed by the archfey to "resemble their deeds and the heart of their leader". Regardless, the Fomor take pride in their monstrous appearance, and frequently utilise mutagens and other body modifications to further enhance their physical prowess. Sometimes, it takes monsters to keep people safe from monsters.
After the sacking of Shae Tirias Tolai, the Twilight Court (one of the Group of Eleven) tore itself apart in a brutal civil war. One faction aligned itself with the Fabled King, allied with Thelanis and outraged at the murder of their leader, whilst the other faction sided with Queen Cono'mae. The Queen's followers lost the war, were cursed by the archfey and exiled. These giants fled into Khyber where the dark would hide their shame. They travelled until they found the shores of a vast, underground sea, and there they put down their roots. They founded the city of Vralkast.
The Fomor'ren of today no longer feel shame for their appearance, they have become a prideful people. They built a city in Khyber, one that offers safety and companionship to an untold number of people, all of whom rely on the Fomor for protection. The Fomor have a strong distaste for kings or rulers, it was allowing individuals to become so powerful that led to their downfall. As such, they shun any path that would cause them to become beholden to another power.