I have a suspicion that there's an entire additional level of secret badasses above the marines in Mariejoa.

The 5 Elder's seem to be portrayed as politicians, but I'm sure they aren't. They're probably the biggest badasses in the WG, because Authority Equals Asskicking.

And that's just the elders themselves. They probably have a squad of superpowers bodyguards or something as well.

And that's assuming the Elders aren't serving some kind of crazy demonic/alien entity that's the reason for the Void Century!