I feel like this thread is being taken two different ways. Some are interpreting the thread title as
1. Would the revolutionaries target her?
while others are seeing the question
2. Can she fight?
Okay. Let's do both.
Snow White.
Would they target her? Yes. Her marriage to Prince Charming now placed her kingdom, which had been under the rule of the Evil Queen for years, as subservient to whatever kingdom Prince Charming hailed from. She's a figure head with no actual skills beyond being a pretty face on the throne. She's a giant target.
Can she fight? No. She's doomed. The Dwarves aren't going to be able to make it to the castle in time.
Cinderella.
Would they target her? Yeah, she's a minor noblewoman who married into royalty. She's getting the ax, even if she grew up poor for most of her life, she was still nobility.
Can she fight? No. She's doomed. Her little mice friends aren't going to be enough in this case, nor will the Fairy Godmother likely be able to stop the rising mob.
Princess Aurora, the Sleeping Beauty.
Would they target her? Yes. She's a princess, whose personal curse put an entire kingdom into slumber. There's likely to be some animosity towards her.
Can she fight? No. The Fairies may escort her to safety and away from the revolution, but that's her only hope of survival.
Ariel.
Would they target her? Yes. She's some foreigner that the prince married, likely pissing off local kingdoms in the process. Prince Eric doesn't seem like good ruling material.
Can she fight? She has no clue what a fork is. A populist revolution is going to be beyond her. She can beg her father, the godlike ruler of the oceans to provide her with sanctuary, but otherwise the mob is going to get her.
Belle.
Would they target her? She's now French royalty. DUH.
Can she fight? No, she's educated enough to know what is going on. Would probably convince her husband to relinquish any pretense of authority and give the people what they want. The theory that the Beast's parents were killed in the revolution, and that they hid their son in some far off palace away from Paris fits with this. She's one of the few princesses who would surrender early enough to prevent animosity that would bring her head on a pike.
Jasmine.
Would they target her? Yes. Agrabah had a ton of unrest and poor during her father's reign, and while having access to a literal genie is probably going to be helpful for the economy, Jasmine is still a symbol of the monarchy, even if she's married a street rat. Aladdin is a class traitor.
Can she fight? Mostly. She's been able to escape the palace before, and thanks to her time with Aladdin, isn't as naive anymore and could possibly survive on the streets. She's got a chance of surviving. That being said, she's probably the one princess who would fight the mob to the death to maintain the royal rule.
Pocahontas.
Would they target her? No. This scenario isn't really applicable to her.
Mulan.
Would they target her? No. But she'd be there at the capital defending the Emperor from the "unruly mob" and give her life to keep China under his rule.
Can she fight? Yes. She'd fight for the emperor, and die in the process.
Tiana.
Would they target her? Probably not. Tiana would likely advocate for the royal family to step down and emulate the British royals, becoming figure heads. But that's not likely enough, and one morning Tiana would wake up to get ready to run her business, and read the paper to learn that her father and mother in law are dead in their homeland. Still, the former prince and his American bride are almost certain off the radar of the revolution.
Can she fight? If somehow a mob came after her... sadly she'd have experience with that.
Rapunzel
Would they target her? Yeah. She's a princess who appeared out of nowhere.
Can she fight? Yeah. She's tough enough to escape and survive on her own. No guillotine for her.
Elsa
Would she get targeted? No. She's effectively a demigod.
Can she fight? Yes. Any rebellion would be crushed into oblivion.
Anna.
Would she get targeted? Probably. It doesn't seem like she's really up for the task of ruling. It depends on how hands-on Elsa is. I can see people peacefully advocating for Anna to step down, and even those peaceful protests being suppressed by Elsa at first, before she is convinced to allow the country to transition to becoming a constitutional monarchy with a democratic system. I suspect Anna would be all for abandoning the monarchy.
Can she fight? Not well enough to escape a mob.