Cinderella and Belle seek adventure the most but Merida is the most adventurous.

She and merida should have a tie

And ariel

then Ariel

There are princesses who "talk" about having adventures, and then there are princesses who act on the desire to have adventures. The names of the most adventurous are Ariel, Rapunzel, Merida, and Pocahontas. I'm just picking Ariel, because she was the first of these adventurous princesses.

Also odd, but these are almost all in my top five....

Ariel too I guess. And then Pocahontas.

Definitely Ariel. Rapunzel doesn't actually venture until she's 18.

As soon as we see her she jumps off of a cliff. That's all the proof I need.

Or Ariel. Then Pocahontas. Rapunzel isn't all adventurous until she is willing to go out for her dream.

Ariel. Rapunzel wasn't brave enough to go outside until Eugene came along.

Ad Merida

Also Ariel.