[quote=@LadyRunic]
[@Prince of Seraphs] Type, generally. There is a leniency for Fae Rulers having to surrender a vassal to another Court. Or the Wild Fae. Generally Fae will stay within their Court type, Seelie/UnSeelie, and even more will remain under their ruler if the ruler is a good one. Those that flee a disliked ruler or to a different Court will generally be turned back by the border Guard as they could be spies. Most of these will become Wild Fae, outcasts, outlaws, and if their Ruler takes it in mind they will be hunted down.
[/quote]

Sure getting a new citizenship is a near impossibility for the fae but what keeps types confined to their specific court? I don't really understand what makes one fae Fall and another Summer but assuming their is actually some logic behind that what would keep these types inside their own courts.

Fae from various courts travel to others, probably with a purpose or a goal. Maybe even on orders from their ruler but a good number of different types of fae are extremely promiscuous. While one fae might not be able to migrate easily to another court there is no reason why they might not get a fae of another court pregnant. For that matter why couldn't fae slip between the borders or use false papers to gain entree into another court. No border guard is perfect not even those of the fae and over time as those small number of fae that do get through and don't get apprehended by bounty hunters afterwards would eventually start families and their type would spread into a different court. While we're at it I was under the impression that the rulers often bartered with the lives of their servants and slaves. Like if their was a rare fae under Nyx's control Falk might offer him a trade in exchange for that fae's true name.

It's sort of like keeping Scotland, Ireland, Wales and England separate. They sort of more or less stay their self same country but there is a great deal of bleed over. Welsh in England, English is Scotland, Scottish in Ireland. You get the point.

Also going back to this exactly what makes a fae Summer, Fall, Spring or Winter. For that matter what makes a fae Seelie or Unseelie. From the folklore that I've read those distinctions have quite a bit more to do with how the fae behave rather than what they can do. I'm not sure the exact differences between the seasonal courts but as far as I'm aware Seelie only do serious harm to a human if provoke, they prefer to play play pranks on the mortals (side effects can include death but not normally the initial goal). Unseelie on the other hand go out of their way to taunt and torture humans because they find it amusing and fun. That doesn't really bring to mind a specific power set. What about a Mara or a banshee makes them specifically Fall? What about a Selkie prevents them from being apart of the Winter Court? Why can a pixie only be from Spring? I'm honestly looking for an answer because from my viewpoint it looks more or less arbitrary.