Livia is Rosaline's sister. She believes that marriage is all she needs to have a happy life, but while she's searching for love, she's gets drawn into a sordid secret she knows nothing about.
Rosaline: This is madness, Friar. I know not why you perform a wedding between a Capulet and Montague. Juliet: Rosaline! Friar Lawrence: Because I have performed far too many funerals with both your families this summer and who's to say that love won't succeed where violence has failed?
