I think the most important qualities that all the ディズニー Princesses share are their moral values and 愛 for others. It's also important to never give up, to treat others as あなた would like to be treated, and to be passionate. Apart from being royalty, all the princesses have their eye set on some kind of goal (ex: going to a ball または finding adventure), a hobby they're passionate about (ex: painting または collecting artifacts), and a really strong 愛 for someone in their life (ex: significant other または a family member). An animal sidekick is a bonus lol :)
Aurora, Tiana and Rapunzel are the only ones who wear crowns. あなた could say that ジャスミン is wearing a freestyle untraditional tiara simply because she has a royal jewel in the middle of her headband. But that’s it. The others do not wear crowns. Sorry this was @MsPotato