Speaking of young girls wearing machine parts and fighting aliens…:
With two full seasons, an OVA, and three stand-alone episodes, one could say that Strike Witches did pretty well. It also has a spin-off, the Brave Witches, which didn’t do nearly as well as Strike Witches did (with only one season completed).
In this parallel-reality Anime rendition of WWII where an alien AI race has invaded Earth, many of the most successful WWII flying aces from our reality have been incarnated in the form of magic-wielding teenaged girls called “Witches.” Squadrons of these Witches ultimately take inspiration from the three Russian all-female airborne divisions that existed during WWII, the most well-known of them being the 588th division called the “Night Witches.”
Similar to Fubuki in Kantai Collection, the main character in Strike Witches, Yoshika Miyafuji, occupies the first season working to prove herself as a capable member of the squad. She ends up quickly surpassing many of her comrades, only deplete her magic executing the most OP ability in the entire series — only to, somehow, gain it all back again in the OVA.
Then again, who actually has watched this Anime for the “plot” anyway?