Great series. Interesting concepts covered, and the camaraderie between characters.
Has been many years for me. Need to watch all of them again now that I've researched Q topics.
Here are a few terms that pop out on the wiki page for one of the films:
"Puppet Master", "Doll Handler", forced suicides, kidnapped children, collective consciousness, brainwashing facility, elite group of pure-bloods, abduction infrastructure
https://en.wikipedia.org/wiki/Ghost_in_the_Shell:Stand_Alone_Complex-_Solid_State_Society
For anyone who hasn't given it a chance because 'it's a cartoon', Ghost in the Shell was the main inspiration for "The Matrix" films.