I agree with Joseph Bryant; Juliet was an innocent child who matured into a young woman full of courage. In the beginning of Shakespeare's Romeo and Juliet, Juliet is simply an innocent young girl who desires to please her parents. When she is asked of love and marriage she replies that she is not ready for marriage, and that she will only love with her parents (parents' = plural possessive) consent. Juliet is ignorant of what true love is. I do not agree with Bryant when he says Juliet is "eager to outdo her elders", instead she was just eager to please them.

When Juliet and Romeo initially meet she has her first encounter with love. Originally she simply flirts with Romeo, but she quickly becomes enchanted with him, begging the Nurse to discover his name. When Romeo's name is revealed she proclaims, "My only love, sprung from my only hate" (1.5,140). Juliet does not deny her love for him even though he is a Montague, and a bitter enemy of the family. This is the beginning of her transformation into a young woman.

Juliet defies her father in act III, scene IV and it becomes apparent to the audience she has fully come of age. She is no longer a child who is ignorant of love and totally submissive to her parents, but now a young woman who is determined to follow her own will. She is so courageous that she is willing to cheat death, leaving behind her parents and formal life, to be with her true love. She maintains her innocence, believing that love conquers all, and unlike Romeo she does not simply blame fate for her misfortunes but instead attempts to shape her life by free will. Unfortunately, no matter how courageous and willful she is, she cannot escape falling victim to the contorted world of hate in which she lives.
This is a fine response, and it gets better as it moves along.  The middle paragraph is good on its focus on J's initial transformation, due to love; and the final paragraph sets out the key elements of her determination to follow her own will, her courage, and her efforts to maintain her innocence.  With a stronger opening, and perhaps more focus, this would be excellent--it's pretty good already.  9.0