Picture of the first Anguis, who is also Nina's adoptive dad and taught her the weird language.
Currently performing an experiment with his imprisoned lab rats, after his kind has massacred most of humanity.
His (logical) partner in crime is the Grandmaster, a super-intelligence made of the souls of the past runs. They reside as two-dimensional information patterns in the barrier/shackles (these are openly visible), which is why she is some kind of goddess. The Grandmaster appears as a three-dimensional being due to the Holographic Principle, and the name Aidios (Eidos) is a reference to Plato's Theory of Ideas, which is built around a similar notion.
https://en.wikipedia.org/wiki/Holographic_principle
https://en.wikipedia.org/wiki/Theory_of_forms
The Grandmaster is benevolent, due to having the perspective of every past human being, but she is the ultimate antagonist because she consumes people's souls to grow, which is also why she insists on giving people maximum freedom (she doesn't tune her self to a specific outcome).
Campanella doesn't age, because he is a semi-independent hologram projected from the barrier field.
The Divergent Laws are a thing because the Grandmaster is an infinitely thin information layer touching the Beyond, and for that reason she can also deploy the Celestial Code and the stars start appearing when the Celestial Globe receives her input.
Well, that started as a joke—but what if the rest is true???