TSF rules clearly state Section 2 subsection B shortly after falling in love with the main rival
1) No matter how powerful a being is before or after transformation, one an unexpected alliance of their most basic enemies or random fodder will even if temporary capture and/or imprison said being until either the original rival occurs or until she loses her temper full.
2) This will only be extended if there is a commonly know but rarely seen item that will render the transformed powerless even if this item normally though rare tends to be utterly useless.
3) The more powerful the being before transformation the more powerful the backlash of these new emotional responses thereby sapping said power and or normal thought process and making the capture and/or imprisonment that much more embarrassing yet plausible in some cases.