Perhaps SPHEW will help there. Harry has had knowledge of the nature of the "magical remnant of the Dark Ages" since meeting Draco at the station, reinforced by Azkaban,.

Hermione would know intellectually (quoting Harry) "So the world is broken and flawed and insane and cruel and bloody and dark. This is news? You always knew that, anyway...", but should lack direct experience, that her fellow students may have.

Will Draco conspire to protect Hermione against the Slytherin bullies?