The three commanders that possess a link with the Faceless are Aelius, Reptus and Targon.
Aelius is a Faceless, Reptus and Targon were both slaves, and served as gladiators for the entertainement of the Faceless after their homewolrds and races were conquered. Targon also served as a kind of Overseer in the arena of extreme brutality and tyranny.
Back on topic :
There's good things to know. I think they should emphasize on the "factions fighting for space portals" a little more. Cause honestly I wasn't even aware what these blue rings were, and that they were of such a crucial importance. All you see is factions fighting over a planet, but you don't have any clue that they're fighting for what's above the planet.