[X] SaucerTek: Study of Destroyer Technology had led to a variety of advances in gravitics manipulation and energy generation, allowing for the development of Beam Guns, Jetpacks, Saucerships, tractorbeams. During the war, this technology had only been able to be fielded in limited amounts: deployed with extreme care because of its cost. Now, however, a number of these advancements were finally becoming available for common use: the sight of flying saucers in the sky a regular occurance all throughout your planets various metropoles.
Aesthetics: Rayguns, flying saucers, jetpacks, and tractor beams to abduct cattle. Think classic pop culture aliens of the 50's and their homages, from Mars Attacks to Destroy All Humans. Smooth, windowless metal, minimal detail. Disc shaped craft with no obvious windows. Thick, rubbery enviro-suits, typically with fishbowl helmets. And everywhere and anywhere, unnecessary fins. Analog consoles and computers covered in diodes and switches.
[X] The Sevenfold Ministry: The Ministry began life as a God-Machine cult, viewing them as holy guardians. Over time, it expanded and evolved into becoming the central governing body of the world, becoming a strange mix of bureaucracy and religion guided both by faith and statistics. Compulsory education, data based policy, and veneration of the machine spirits would become the backbone of this body politic, divided into seven individual ministries, each with their own particular theology and purpose, from the Ministry of Bread which handles the growth of food and feeding of the flock to the Ministry of Steel which trains warrior-monks tasked with protecting the innocent or the Ministry of Scrolls from which teachers and educators graduate.
Social Aesthetic: A lean into the religious aspects, but instead of taking from Space Catholicism and Dune-esque Mystery Cults, you take more from ancient Persia or China, blending theological doctrine with bureaucratic statistics and scholarly pursuit, faith backed not by blind zealotry but through rigorous study of the world and its systems.
[X] TekKnight: During the war, the Destroyers had deployed a handful of automata, none so dreaded as the Annihilator Engines, gigantic war-machines piloted by crippled Destroyers, capable of smashing through even the heaviest fortifications with ease. Your own TekKnights were deeply experimental, but they should serve as a decent countermeasure.