Avo'kaibari
From The Everdeep Wiki
Literally "Great Men of War" in Old Sindathi, these are the highest class of ruling nobles in the Sindathi Empire save for the Emperor himself. In theory, the avo'kaibari are the personal slaves of the Sindathi emperor, trading their lives and obedience for power and wealth. In reality, they are a class of rulers unto themselves which are often powerful enough to alter or resist Imperial wishes.
Typically, each Imperial province is ruled by an avo'kaibar. They themselves possess the loyalty of lesser kaibari and sibbari.