Their personalities are so incredibly varied, I really doubt that they could get along.

I'd say, since they are the most different among themselves.

All are very outspoken and there are many conflicting personalities. Same goes for the Renaissance tho.

the outspoken ones wouldn't always get along with Elsa (and vice versa). Tiana would probably think the others are irresponsible or childish, Merida and Anna would think Tiana is boring, Merida would think Elsa is weak and passive, Merida and Tiana would think Anna is dumb, Merida wouldn't like that Rapunzel doesn't outright rebel but is sneaky.

I agree, they're too different and most of them are too selfish to try to get along.

All of the girls our so different in personality yet so alike in motives that they would butt heads. All of the girls want, "more" 24/7, and that personality trait would cause conflict with each other. Mulan would hate Ariel's selfish demeanor and how she treats others like dirt, Ariel would hate how Belle never went on adventures (Like how Ariel hated when Flounder didn't go explore the ship with her and was rude with him because of it -_-) Belle would dislike Jasmine not spending more time with her family, and it goes in a gigantic circle.

Between this and the Renaissance princesses.

I really think they wouldn't get long well at all. As it's already been stated this group definitely include the most aggressive of the groups. I mean would I think they would just out right argue with each other,no! No I don't. But! If they were on a survival show or something where they were stuck with each other it would be a totally different story. And to a lesser extent I would say the same for the Renaissance girls.

Definitely they would along the worst. Tiana would be critical of all of them, calling them irresponsible or immature (she definitely would not approve of Elsa running away from her queenly duties or Merida trying to poison her mother). While I can see Rapunzel and Anna getting along, I can see Elsa being very critical of Rapunzel ("you've married the first man you've ever met in your life!? What is wrong with you!?") and Merida would sneer at Anna and Rapunzel for not being more rebellious towards their upbringing and find Tiana completely boring, due to her reminding her of Elinor. Rapunzel might find Tiana overbearing and Elsa a little cold for her tastes, and she would get a little hurt by Merida's remarks.

They are generally the most diverse group. Especially Tiana would be judgemental of Merida for cake accident.