This LORA is all about mechanical_wings! It can pair well with large_mecha_arm.

Try a prompt like this: full_body, (masterpiece:1.3), (best quality:1.2), 1girl, detailed eyes, blonde hair, blue eyes, ponytail, bikini, large sagging breasts, (mecha musume:1.1), (mechanical wings:1.2), (thrusters:1.5), jet fire coming out of thrusters, midair, in sky, blue sky, clouds lora:mechanical_wings-000007:1.0

Toss in some mechanical, robotic, etc, bits as you please.

https://civitai.com/models/10050/lottalewds-mechanicalwings