Not only has she the power to destroy souls, she knows full well that she also has the power to create life. Just as she has the power to reach into your soul for all the negatives, she knows that she can release those deep inner feelings that hold people back from doing whatever they feel they need to do. Knowing this, why doesn't Fienderella use her power for the good more?
Sadly Fienderella feels responsible for creating the immortal ego that Prince Charming is portrayed in all the stories instead of the true Prince Charming he really is. She despises herself for allowing the world to use his portrayal as a handsome romantic man who many a little girl hopes to end up marrying. It eats at her that her story of tragedy and humble beginnings can still find love and a supposedly happy ever afters is actually, as she sees it, creating willing victims for other pseudo Prince Charmings.