That group of people wasn't originally one. They were many who acted for different purposes who ended up sharing the same tragic fate and bonding over it.
Generations of living as one and breeding into each other's families led them to create a diverse society of united people. They, naturally, needed a ruler. Not an entity like the source of their tragedy, but a fair and just ruler who truly cared for his people.
The system they employed was a branch of democracy created exclusively for the use of their society. It was strange, as they had to account for their curse and other matters exclusive to those who were enemies of the sun, but the essence was still the same.
The society itself chose who was worthy of standing at its head. Currently, it was a man named Hendricks Urson.