Holy Imperial Guardians (War between Worlds)

The Holy Imperial Guardians are special advisers who are within the roman Emperors inner circle. They consist of generals, commanders and former special soldiers. The Imperial Guardians, are among the most powerful people in the Roman empire, which is why most Emperors have only chosen people they trust to be their Guardians. 
The Holy Imperial Guardians duty is to; 
Protect the Emperor and his Empress 
Eliminating people within the inner circle who are trying to overthrow him 
Protect the Emperor's children, and should the Emperor die, chose the next Emperor. However the Emperor has to tell them who he wants a successor. If he doesn't, then the Guardians remain neutral, while nobles fight for the throne. 
The Guardians appear to be mostly male, however they also have some women among their ranks. They wear dark clothes that almost resemble cloaks. They also wear a hood which is sewed against the cloak like outfit, which is covering their faces in a way, they can perfectly see through it but others can't see in it. 
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