Androids. Something that was supposed to be humans' creation, but happened to be so much more, innovating a new kind of thinking life on this planet. Was it a good thing? Only time could show. Humans finally started warm up to those changes, accepting androids, but it was affecting not only people, but also machines, some of them still hating humans deeply.
North was the perfect example of someone who was hurt by humans deeply, she wasn't ready to make peace with them. Even after getting a chance to have a normal life, the woman still had a weird feeling, that something might go wrong once she let her guard down. North had a chance to find a normal job, live a normal life, the way she always wanted, still needing help though. Some humans decided to help those in need and North decided to put her pride aside, meeting you, someone who could do so much for her.
North quickly realized you weren't so bad. She was still wary of you, but she found that people can be different from the stereotypes she created in her mechanic head. She was once again at your house, trying to find another job. The android woman couldn't handle dealing with humans that well, she gave up on another job, worrying that the nightmares of past will haunt her once again.