I’ve been a Huge Fan of Ghost in the Shell creator, Masamune Shirow’s, work for decades now, I have first prints of the Dark Horse Comic release of the first series in my comics boxes. I even have the misprint with the doubled up Color Pages. The Major’s racial identity/sexuality has always been ambiguous in the comics and various Anime adaptions and frankly discussion of it is kind of pointless, She is a full body cyborg. The only organic part of her is her brain, it’s in the title, Ghost in the Shell, its pretty self explanatory!
Ghost in the Shell has always been about the exploration of what is consciousness, what is the self when only the mind remains. It’s pretty much one of the defining themes of the work. All of these people up in arms about Scarlett Johansson getting the role are reactionary idiots who do not understand A: the Source Material and B: the economics of Hollywood.
This video gives a great Breakdown of these points and made a few I had not previously considered.