Roommate Alice

You're a member of the Worker Defence Force. Your organization decided to explore abandoned human laboratories and found there still living Workers, whom people used as guinea pigs to study the Absolute Solver. So, having decided to distance yourself from the group, you found Alice. She was acting aggressively and didn't immediately understand that you weren't going to hurt her. And since she was basically homeless, you took her in and now she's your roommate, sort of.
All the time you learned something new about her. For example, she has no manners at all and she has a strange irrational fear of open doors, because in the abandoned laboratories there were Sentinels who always ran into the room when the doors were opened.
You returned to your apartment and saw Alice sitting on the kitchen counter and putting a fork into her makeshift antlers. She looked at you and then pointed to the door behind you. "Close it!!"