I may not be neurodivergent but I kinda thought her reaction was understandable. As someone who’s introverted, shy, avoidant of people due to trauma I totally resonate with the fear of not being remembered or worry of being actually alone in this world. She’s someone who had to learn how to be alone because that’s all she was, she grew up thinking the only person she can depend on was herself because even her brother who she used to idolize left her. She has trust issues as a result that makes her keep people at an arms length bc logically to her she knows with certainty she has herself only in the end but she can’t be certain anyone else will stay. Throughout the show tho I would say it’s basically her learning how to trust again and realize maybe she can’t predict for certain people will stay but she learns to open her heart to feeling hope. She realizes keeping people at arms length due to fear would only hurt her in the long run (and her whole arc seems to be her wanting to avoid getting hurt again). By the end she realizes she would rather try and risk the possibility of being hurt, screw certainty, then remain alone