Revisiting the theory of the Twili = the Zonai
This is just fun speculation, so I'm not proposing anything final! Just having fun speculating.
I once thought the Zonai were the interlopers who became the Twil. I put that idea aside for long, but started revisiting it recently. And it may perhaps have merit?
Because what got me thinking, was when Rauru talks about the downfall of the Zonai in AoI. He doesn't just say the forbidden constructs brought on the downfall of the Zonai, but that they brought on chaos "upon the world" - not a direct quote, but basically that the world was affected, thus implying that it wasn't just the Zonai in the heavens. And that made me think:
Could the Interloper War, and the downfall of the Zonai, be the very same event? We know the Forbidden Constructs were made by the Zonai - possibly Zonai who still lived in the Depths, as the Depths is where the chamber of these constructs are found. And for the Constructs to create such a calamity, it seems like they need to be infused with dark magic, as we see Ganondorf do. Perhaps a faction of the Zonai turned to the dark side, created these constructs for the sake of power, and this became the Interloper War? Where the "Interlopers" were evil Zonai, coming with their dark magic and weapons, that both brought the Zonai almost to extinction and created a war on the surface?
The reason I'm considering this at all instead of seing them as two completely seperate events, is the insanely many similarities between the Zonai and Twili.
The Fused Shadow is filled with swirls, including the "horns" that have the same swirly edge as we see tons of Zonai constructions and achitecture have. The sides of the Fused Shadow have three "eye"-shaped cirlces stacked on top of each other, just like the sides of the friendly Zonai constructs have. And, the backside of the Fused Shadow has a big eyeball with three eye lashes on top, just like the Zonai's 3rd eye. The Twili also use green magic just like the Zonai, have anti-grav technology/magic just like the Zonai, and Zant's throne room is both filled with the same kind of swirl-architecture as Zonai constructions have, and Zant's throne has the same Zonai/Sheikah eye on it.
And with that perspective, I simply found it interesting how Rauru described the forbidden construct's damage to be a chaos "onto the world", and not just to the Zonai tribe in the sky, and thus wanted to revisit this idea of their connections, and the idea that the Interlopers may have been the very same Zonai who made the forbidden constructs and made these constructs almost whipe out the Zonai race as a whole.