Dear @Jassica, 
Unfortunately, I am not aware of any privileged visa policy for people who are born in Germany but don't hold the citizenship or any residence permit (anymore). I am afraid that the person would need to apply for a student visa within the normal procedure. Sorry that I can not share more positive information for the time being. 
In any case, please don't hesitate to get back to us with any further questions. 
All the best, 
Meike