"That would only have mattered if I had been available as well, Hermione, so what's your point?" They exchange a stubborn look. "Now that Malfoy is here, Tom is already missing two crucial components, ingredients, whatever. That gives us more time for now. Even if he eventually gets his hands on me by some unfortunate coincidence, he'll have to find a suitable substitute for Malfoy first. It was the right decision to defect."