Character designs I made which I later predicated my graduation project on. They are combat androids conceptually inspired by the vocaloids VY1 and VY2.
Visual inspirations include red & blue oni iconography, tech wear, samurai and miko, and single versus paired elements. I emphasized their more robotic features to visually distinguish them from a typical human.
My feminine design (sometimes just referred to as "One"). My idea for her was that a manufacturing error has afflicted her with near-permanent RBF. As such, she seems intimidating until she "overloads" on an excess of feeling (say, embarrassment), after which she blue screens.
My masculine design (sometimes just called "Two"). I think he comes off as disarming, maybe even lame. My classmate suggested he might have an impairment in pain receptors, so it lends to some reckless (even comical) behavior.
My masculine design took a lot more iterating to get to land on something I was satisfied with. He doesn't have the same imposing edge she does, but he does have this disarming feel to him.