well since it is confirmed that there are two dolls at hand, let me put in my two cents on some options not yet thought of.
1. creepy girl has two dolls to give out and wins if both of the players holding the doll die (3rd party)
2. " " and can view what action the holder of one doll does (town)
3. " "and forces the holder to only be able to give away the doll instead of regular night action (town/mafia)
they are in order of what i thing is most likely