She can feel a resistance, but it becomes clear that Fenrir knows nothing about Occlumency. His mind is open to her, if only she dare. She is still clumsy in her skill, not quite a master (she always hoped she would never have to utilize this talent she picked up after the war). But Hermione can’t rely solely on the diary anymore, not as she delves deeper into this new identity. She needs to know more about Marion Lestrange, and Fenrir Greyback seems to be the only one who really understands her. 