I wished to know the prepositions that we can use with Pandora's box when individuals deal with the impact of this .For example in the sentence, "Maria opened a Pandora's box_________Kelly", which preposition should we place in the blank.What preposition should we use here for people receiving an action.
If you're trying to say that Maria caused problems for Kelly, you could say, "Maria opened a Pandora's Box FOR Kelly when she arrived at her wedding with Kelly's ex-boyfriend." "For" here means that Kelly was the target or recipient of the Pandora's Box.
It sounds strange to me to follow the expression "to open Pandora's Box" with anything meant to direct the effects towards someone. When you "open Pandora's Box," I think it implies that the effects are felt in a more global sense--not just by one person. I searched for the expression followed with some of these prepositions on Google NGrams and it didn't come up with any.
If you were adamant about making this sentence work, I think, in addition to "for," "on" would be an appropriate preposition to follow the expression "to open Pandora's Box."