AU. Hermione Granger and Bellatrix Black. In her sixth year, Hermione receives a priceless artefact from Professor McGonagall: the Diary of Bellatrix Black, esteemed Auror and one of the best Duellists of her generation. She is fascinated by Bellatrix and falls in love. Resigned to comfort herself with but her memory, Hermione learns that her beloved is not as she seems.