The Shunned

The Shunned are a race of Cironean that splintered off of the Cironean Commonwealth early on. The Dark War cost them their status in the Commonwealth and they were expelled from the planet, finding a world known as Ayphus in the unknown sectors of the galaxy as a new solace.

While they were gone, they managed to find other allies (Even certain elements of NEXUS are followers of Chaos). But they mostly stayed in the dark watching their light counterparts live on.