If one wishes to gain something, one must offer something of equal value. In spycraft, it's easy. Applying it to a relationship is another matter entirely. F!Agent/Theron Shan. (Spoilers for Shadow of Revan and Knights of the Fallen Empire.)

Sequel to The Arithmancer. Years 5-7. Armed with a N.E.W.T. in Arithmancy after Voldemort's return, Hermione takes spellcrafting to new heights and must push the bounds of magic itself to help Harry defeat his enemy once and for all.

... How I Learned to Stop Worrying and Love the Cruciatus. Albus Dumbledore always worried about the parallels between Harry Potter and Tom Riddle. But let's be honest, Harry never really had the drive to be the next dark lord. Of course, things may have turned out quite differently if one of the other muggle-raised Gryffindors wound up in Slytherin instead.