Edens Zero: Who Are the Oracion Seis Galactica?

As an extensive space opera, Edens Zero is laden with all sorts of criminals and outlaws that have ravaged planets for their selfish desires. However, none compare to the overarching impact and notoriety of the Oracion Seis Galactica, a loose association of six of the strongest villains among the cosmos. While being branded as a Galactica member may not necessarily impose antagonistic tendencies, it certainly deems them a threat in the eyes of the Cosmic Government.