If you're looking for manga similar to Robot Girls NEO, you might like these titles.
Aida and Lennon have resurfaced in Genji's outer-space "homeworld," under new identities as caretakers of a space station. But so have Mondain and Minax - as scientists who have discovered the remnants of Exodus trapped within an asteroid and seek a way to unseal the dark god.
9S is set in an age of science, but in a too distant future. The Mad Scientist, Mineshima Yujiro, dissapeared several years previous to where the story begins. The inheritance he left behind, the technology and objects he had created, were given the codename 'Legacy', and are highly sought after by government agencies and terrorists, for reasons both good, and...not so pleasant. One of these 'objects' he left behind was his daughter, imparted with a mental calculating capacity that dwarfs supercomputers, combined with her physical body, which makes for a devastating combination.
Universal Century 0153. During the war between the League Militaire and the Zanscare Empire, Uso Ewin while alone on a reconnaissance mission happens upon the Zanscare Empire's Newtype squad, and finds himself blind-slighted by a Zoloat, and comes under attack by the mysterious Mobile Armor Zong. However he finds himself rescued by an old junk dealer Grey Stoke. The pilot of the Zolat, who was also rescued alongside Uso is revealed to be a young girl named Kamui Gian.