Whether or not Antonin would succeed was still a mystery to Hermione. If he waited long enough and chose his moment carefully, she believed he would be the Dark Lord's successor. Immortality was a failed desire for the Dark Lord. With his horcruxes destroyed and his soul far too splintered to make another, he was at the mercy of his own magic. When the day came that he was no longer the strongest, he would fall. All the more reason it was important that she run when she could. If Antonin failed, she would be punished right along with him. As his most prized student, he was the reason why Hermione was as ruthless as she was. It wouldn't be a far stretch to assume that Antonin possessed her entire loyalty. Once upon a time, he had.