Keep stealing the equipments from party member and kicking them away after is a feature or bug? XD
I understand that you have the design of making the transformed character powerless, but I think the boss fight could be improved. All three of the monster attacks are totally negative, and it feels strange to force the player to kill their other characters. Maybe you could add some positive effects or choices, or at least make them uncontrollable, which could also show the authority of the boss as leader.
The game is fun, hope I could cure my character's curse in the future.