A lot to unpack this chapter.
The Emperor turns out not to be a Futurist like all the other tree body people, but rather an actual Druid inhabiting an artificial body. It explains why the Druids have more presence in the Empire than the other nations, as they are actually running it. It hasn’t been made explicit yet, but it seems evident that all the tree bodies are made from the Druid trees.
I like how, in many ways, the series is science fiction disguised as fantasy. The towers being compared to radio towers, the horns of the rami being essentially receiving antennas, time travel, and now alien invasions.
The Emperor offering Kayano conquest and status, not understanding Kayano is not interested in such things, is a clear parallel to how the Pope tried to sell Lucas on the idea of being a great hero, which Lucas was similarly uninterested in. Also of note is that, in both of their cases, the “powers” we initially see them using are revealed to be side effects of their actual powers.
Speaking of parallels, the one between Kayano and Zoe has never been more evident. Both young girls, who didn’t know better, have been manipulated by fake parental figures into carrying out terrible things, only for both to want out once they comprehend the consequences of their actions. If any characters survive this series, I expect it to be those two.
Mira seems like a decent enough fellow, not telling on Kayano to the others, though I imagine he might also not be keen on the idea of an alien invasion. Either way, I doubt he will teleport Kayano back home. Akira might also not want that, as he seems to truly care about Kayano, despite his attempts at making her into a hedonistic, uncaring soldier.
I imagine the reason the Emperor doesn’t allow Akira to go all out with the Tower’s power is because it would accelerate its imminent wilting. I predict that Zoe is going to be captured, because as a sapling candidate, she has been established as an ideal new core for the Tower. I imagine this will cause Lucas to go attack the capital to save her, before his own flowering is done recharging, so he won’t just be able to make them kill each other like in Southampton.