FPE theory

I have a theory about FPE. miss circle is a killer and violent teacher. That makes her dangrous and a scary teacher. According to the google it says "Also knowen as Very Very kind math teacher" wich is i dont think its true. and when ever she kills someone and another stydent sees her she kill him too to make sure no one knows that she is a killer. (if you have another theory say it to me)