Well that did not take long. Episode 18 reveals more of the fact the the Throne Gundams are not Celestial Being. They use imitation Solar Generators and one of the observers is definetly a traitor.
The three pilots are further revealed to be psychotic murderers. The girl Throne pilot massacred a wedding party that Louise was attending for no reason at all.
The scene was a little thick. I mean the viewer gets it that the Throne pilots are bad but that was way over the top. Graham Aker manages to damage one of the Thrones too, so they are not on par with Setsuna.
The episode wraps up with Setsuna attacking the three Throne Gundams. I’m sure that that will not go well since Setsuna is acting on his own.