@eviljackspicer as a fellow with a light Asperger's syndrome condition, i agree that a doctor is a must, to help improve your mental health and stability, as such proper medication is needed. BUT, i can say for my own experience, that the environment that someone with Asperger's syndrome is, has a huge impact on that person, and depending on how severe it is, can be as such it is depicted in this manga. And if that person in question is in a place that don't stress her/him over, but instead helps to calm down, it's a great help that that person needs. I say that for personal experience, because when i was at high school, i was taunted very often, and i would do the same as her, react with violence, because that was the only way of "answering" i knew. Only after i graduated and left that stressful place i was able to control myself more and interact in other ways.
But regarding her situation in specific, i agree that she needs a doctor. But again, she has traumas, don't trust other people easily, and has 3 conditions: Asperger, panic attacks and OCD. That's not something easily handled by many doctors, and even some psychiatrists would have a hard time with this mix. She's better with Yokoi, that even not being a doctor or anything, understands her every need, and helps her calm down whenever needed.