Act 5 reveals a Juliet that the reader has witnessed in previous parts of the play Romeo and Juliet. Juliet's character changes from an obedient, young, and immature child to a mature, self-righteous, developed young woman.
Although Juliet is not dreaming of marriage at the beginning of the play, in Act I, Scene 3, after Lady Capulet advises Juliet to consider Paris as a possible husband, Juliet obeys her mother's suggestion.
I'll look to like, if looking liking move;
But no more deep will I endart mine eye
Than your consent gives strength to make it fly.
However, after Juliet encounters Romeo at the Capulet masquerade, her character begins to transform. In Act II, Scene 2, Juliet contemplates the idea of being with Romeo, who is a Montague. Juliet fights for what she believes despite all the odds which are against her and her true love. In Act III, Scene 5, after her mother announces that Juliet will marry Paris on Thursday, she quickly dismisses the idea by stating that she will not marry on Thursday.
I pray you tell my lord and father, madam,
I will not marry yet; and when I do, I swear
It shall be Romeo,whom you know I hate,
Rather than Paris. These are news indeed!
She has evolved into a courageous and brave lover. Juliet is persistent in her love for Romeo. Act V is simply an extension of Juliet's maturity. For instance, when Juliet sees Romeo's lifeless body on the floor of the Capulet tomb, she refuses to leave with Friar Laurence. Inevitably, in order to be with Romeo, Juliet kills herself by stabbing herself with a dagger.