Somehow they all use she/her pronouns or a feminine voice. I don’t have a firm conclusion on this yet - I just think this is a very odd trend.
Will be added to as I find more or as people suggest more.
Ava, from Ex Machina. Source: http://www.wired.com/2015/04/ex-machina-turing-bechdel-test/
Siri, from Apple. Although I guess it’s more her than her creators? Unclear. Source: http://qz.com/409787/7-times-siri-understood-gender-identity-better-than-most-humans/