Sion's defeat of a formidable monster is the talk of the academy, but only he and a few teachers know the truth. Edward in particular can't accept it, so, as a teacher at the academy, he prepares a special lesson for a particular student.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.