Some thoughts on the Demiurge (would appricate interpretation and expansion)
A fragment of the Demiurge surviving Lygus trying to destroy it with a stellaron reminds me so much of how the universe has more matter than antimatter by a tiny asymmetry. If all the matter and antimatter somehow found eachother there would be still a bit of matter- LIFE left, just like how a small fragment of Demiurge had survived the stellaron. It's also very poetic considering Demiurge is the antithesis of irontomb, life versus destruction.
Another thing it reminds me is Ashikai's theory about stellarons, how Nanook might be slowly destroying the imaginary tree's branches and from that annihilation reaction there is left some parts which are stellarons. If that theory was actually canon (I know it was confirmed that the stellarons are created by the harmony but i want to share this thought anyways) it really illustrates the special bond the trailblazer and the Demiurge has. While Demiurge is literally the matter left from destruction, the trailblazer was made specifically to be a vessel for the matter left from destruction. One is Love, the other is connection. One is resides in the past, stagnant, the other is journeying towards the future, moving. Also they are both answers given to a cruel "truth". Demiurge's answer of love to destruction, Trailblazer's path being about moving forward opposing to finality/the end(which makes people feel like what has ended ceases to exist, destroyed.) the Demiurge's original form being a cube intrests me a lot too, i don't think it's explained anywhere? If i recall correctly what a stellaron looks like, their cube like form is very similiar. I may say some nonsense but i want to say this, just like how stellarons grant wishes the Demiurge adopted and granted cyrene's wishes or maybe if we see her answer of love to the question of what is the prime mover of life, by granting an answer doesn't she kind of granted its wish as well? Something else that came to mind about Demiurge's form being a block is the power of logos. But i couldn't word it in a way that would make sense so... I hope somebody else sees the connection and puts it in a better way than i could.
(This is how i tried to put into words for those who want to see anyways: Cyrene is a story teller, documenting memories with words/logos, and later defining a better fate/story with words for ampherous. If i am not mistaken the word logo(s) is connected to the word lego which means "i gather" and "i put together". Words are like blocks we gather and put together to implement, reflect our will. Will is deeply connected to a sense of self, Ego. The block form of Demiurge might be about how blocks do not hold any will but instead carry the will of whoever puts them together/arranges them in a certain order. Cyrene's will deeply affected Demiurge so much that it became an ambassador of that will, later being shaped further with expriences and with the impact of everything it learned from Cyrene, it developed an ego.)