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I think your should use "it" as long as you want your audience to think of your robots as not having human-like characteristics. However, at some point if they are characters in your story, your jo...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/47191 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I think your should use "it" as long as you want your audience to think of your robots as not having human-like characteristics. However, at some point if they are characters in your story, your job is to build connections and bonds between your audience and your characters. Therefore, at the point where you want the audience to view the robots as more humna-like and hence to start connecting (even if it is part-way through the story), you should switch to "he" and/or "she". In fact, make that transition a very clear transition.