Belle, or Tiana.

Ariel, Poca, Jasmine, and Mulan I think would eventually run away.
Aurora, Cinderella, and Snow would keep a positive attitude.
I think Belle wouldn't leave, but she'd be depressed.

She wouldn't even be pampered in her confinement. She'd hate it there.

Ariel needs to be free. She would end up going emo or something locked in that tower with no way to be free and get to be near the ocean somehow. Even in The Little Mermaid 2, she occasionally stuck her feet in the ocean.

Keeping her locked away in a tower is like keeping a bird locked in a cage forever like a bird she's a free spirt that needs to be out in the side open world exploring

Ariel for sure, because we know how she loves to explore things, she loves to change places and to know new things. Living in a tower would be like living in prison to her.

Also Jasmine. She used to run away even from her father's palace, because she wants freedom.

Ariel would be really unhappy there.

Jasmine would go crazy. If she's sad trapped in her palace, imagine a tower.

Also Pocahontas because she enjoys her freedom.

or Ariel.

Can you imagine her not being able to explore and run free and "go wherever the wind takes her?" But Ariel, Tiana, Jasmine, Belle, and Mulan would also have a terrible time of it.