Agonis backstory

The kingdom of Agonis, taking its name from their fire god Agoni. For centuries they thrive, conquering many of Oceania and North America, until an unexplained event wiped out all of their civilization save for the royal family. They has managed to hide and incubate themselves under [insert mountain here]. The king, the queen, and their only son.
While the king and queen still safely sleeping at the center, their son has awoken by the nearby mining activity. Confused, he has come to Neon, to find the remnants of his once powerful kingdom and to find his god back.

Caste System
Caste(s) : Noble, Higher Common, Lower Common, Peasant
Nobles : Royalty and High Priests
Higher Common : High ranking soldiers, priests, richest of Merchants
Lower Common : Everyone else not listed
Peasant : Farmer, Slaves, Prostitutes, Criminals, Beggars.

A man can marry women from lower caste but can't marry higher caste as it's regarded as filthy. Women can only marry men from the same caste, unless stated above. Outsiders are regarded as Lower Common (except their leaders, that is regarded as Higher Common)
Nobles are the only one that can have tatoos on their body, and it is peformed as a ritual to signify their connection to the god. More tatoos = older, the king have so many it covers his entire skin.