I made a headcanon post about him, sorry I am just so invested that I want more world building about things other than the twins, like what does Error's pocket dimension look like? Or how technologically advanced the world is? Maybe drive into the relationships between the different cults.

Is this brainrot?

1. What is Eldritch Ink the god of?

Well, see, that's tricky because they're not really 'gods'. They don't stick to doing one thing like 'god of war' or 'god of creation'. They just do whatever they want, it just so happens that Error destroys and has near absolute authority and the twins favor emotions.

All I have so far is that Ink is prone to accidentally killing 90% of his followers just be getting too excited and that he regularly gets into fights with Error over shattering multiple realities.

2. What does Error's pocket dimension look like?

Error's pocket dimension is basically a multiverse. Everything is normal sized and once you leave it, you're the same size as when you went in.

You can be... anywhere! There are almost infinite locations to explore.

3. How technologically advanced is the world?

I'm not sure if you mean his dimension or in general so I'll give both:

Error's dimension doesn't really have technology, no one needs it there. Serotonin is administered at request and most of the activities involve craft and sculpting. Sleeping is done in orderly cells and time moves at a constant rate no matter what. (Error is a control freak)

But in general, the timeline of events are in modern day.

4. How do the cults feel about each other?