Eons ago, the fae founded their Sindhé kingdom in what is now known as the Western parts of Asgard. Nowadays only the oldest of the fae can tell first hand of these long-passed days, for the passing of centuries and the Asgardian Unification made due to many of the traditions that defined the Sindhé.
It was a culture divided in four different courts, each named after the seasons of the year. Ideally each Court held power only temporarily, with each Lord or Lady ruling during their season and then passing on the leadership to the next Court. In practice, however, the turning over of power hasn't always gone as smooth as intended.
These courts were each closely tied to nature and held their appropriate role in fae society, much like the Caste System which later evolved and rooted itself in the Asgardian Kingdom. It is said that some feral tribes still cling to these ancient traditions.