A few thoughts:
I'm still working on my list. I am looking at the Cinderella Group because Cinderella and the Prince are listed twice-duplicates would be from Princess and Prince Groups... And the Fairy Godmother isn't listed at all anywhere, so I suppose she could be a Disney Girl? I have no idea if other people even want a Cinderella only group--I know you added it when I was asking about Step Sisters and such....that group could be Fairy Godmother, Step-Mother, Step Sisters and no Cinderella or Prince just so there aren't duplicates in groups?
We chose the Cinderella group to match who meets at 1900 Park Fare for dinner. The Fairy Godmother fits into the Disney Girls group.
And then I was thinking about Belle--she could be listed twice Blue dress or Gold dress since we have Ariel Fins and Ariel Feet? My character pics with her are all Blue Dress from Epcot.
We added these.
You can also ignore me and leave the groups alone, which is just fine too.