Sazuki

The Sazukis are a long lasting dynasty of demons that have ruled the 9th plane of torment for approx. 16 millennia.

Their system of rule is as follows:

The current queen is to have 2-3 children (any more children are fed to the Spidrakunn). One of the children, typically the firstborn, is to spend their youth life training to be the next ruler of the 9th plane of torment. The other child/children will spend their youth life training to be a noble. When those children grow up, they are to have children and whoever was noble last will have the future ruler of the kingdom.