In the beginning of the play, Olivia is mourning her brother who has recently died, after her father died. Olivia is very depressed and said that she will be mourning them for seven years; she does not want to leave her house or see any other people. Olivia changes throughout the play by becoming in love with Cesario. In the end of the play, Olivia ends up marrying Sebastian, who she thinks is Cesario (Viola), when it is really her twin brother. Even though in the beginning Olivia says she is done with all men, she ends up getting married, which shows her character’s change. Although, Olivia's mourning could have just been an excuse so she would not have to see Duke Orsino or Sir Andrew.