Despite her crazy, cold exterior, the woman was not entirely heartless. Seeing such a cute animal and the way Harry reacted to it brought a smile to her face. When she watched the animal disappear before reappearing, she thought it would be a great pet for Harry. Plus, she knew that ferrets were cunning troublemakers, a perfect pet for someone who might want to find ways into or out of trouble. Bellatrix looked at the woman with a stern, piercing gaze.