Grej

Grej is the result of the Off-Compass ideologies coming together. This unfeasible event caused an error in the world and created the Glitch called Grej. Grej themselves is a Chaosist and seems to draw reference to the Warhammer gods of chaos even, referencing the god of Chaos Tzeentch.

Creation
Following the initial waves of the Centricide the political compass collapsed inward, this allowed the fringe ideologies and the off-compass ideologies to become politically viable before the compass rebuilt itself.

Different to how Jreg formed the Anti-centrist movement, it was actually the off-compass ideologies that were now viable that combined to form Grej.

The League of Anti-Anti Realists
Grej is introduced as the person that wants to destroy reason and therefore the Realists. He is shown as being the BBEG of the Realicide series.

Anti-Realism: Know Your Off-Compasses
Here Grej introduces the primary Off-Compass ideologies using the 8dreams chart

Meet the Off-Compasses
Grej is the interviewer that interviews the Off-Compasses and seems to be the one that organized the meetings with the Off-Compasses

Literally 1984(tnite)
Seen crying in a corner sad that he is not being taken seriously. He also looks worried at Ingsoc's transformation into Ingcap at the end.

Anti-Realism: Niche Ideologies
This is the continuation of "Anti-Realism: Know Your Off-Compasses". Grej goes into detail about many very niche political ideologies in this video. This is also where we find out what ideology Grej identifies as, an ismistic meta-anarchic hyper chaosist. In this, he also interestingly refers to Jreg as "our dear friend".

Ideology
Ismistic meta-anarchic hyper chaosism is a combination of beliefs.

Ismism is the belief that every ideology should have the suffix -ism added to it.

Meta-anarchy is the belief that any attempt to describe, limit or define something is fascistic, in short, imposing your will on ANYTHING is bad.

Chaosism is the worship of chaos in itself, chaos for chaos.

Physical Description
Grej is defined by their lack of features apart from a basic outline. This outline is similar to that of Jreg. The colours of Grej also vary, though is most commonly the Glitch combination of blue and red around black.

Personality
Chaos.