Probably either Cinderella, Tiana or Aurora.

Definitely. Or Pocahontas, Belle and Mulan.

She's very responsible to her own life.

Abseloutly

Or Tiana.

Someone choose Ariel? *LE gasp*

Through the whole movie we see her 100% in tacked with the Beast and her fathers life. She never knows what to do in her life or what people think of her, but always seems to know about everyone else. When Gaston came to her house and basically said, "Do it with me or I'll make you do it against your will" she acted calm about the situation, never stooping to his levels. She always without blinking an eye puts everything she cares for on the line for her father, I.E. Going to the castle without any idea of what it might hold to save her father, accepting to be the beasts prisoner WITHOUT KNOWING that he will end up changing in the end, and in the climax of the movie, puts her new found love of the Beast on the line to reassure the mob her father isn't a sociopath, everything she does ends up working out because she think things through. People often make the accusation that she's irresponsible because she broke her promise to the Beast, which would be irresponsible if the Beast wasn't the one who actually let her go. Second for me would be Tiana.

If Tiana hadn't gotten to a witch doctor after being transformed by one I'd probably pick her.