I would not be surprised. Her sort is as fickle as they are hardy, and no doubt Silver's hair comes as a fascination to her. I recall Silver having said his Pokemon were like family to him, as well... [Maybe he just had some sort of gift to beguile them...]

Still, she seems fond and respectful enough to heed your words and moods; you must have done some good in raising her. I'm sure you've guessed from Persephone but her breed is not so bold in showing affection to their masters.