Ophelia is a crucial character because the role she plays in creating Hamlet's bizarre attitude, she is used by a number of characters, including her father, for the sole purpose of deceiving and gather information and "misjudges Ophelia's ability" to gather accurate information due to Hamlet's deceitful character (The World Of Hamlet 260). Hamlet is the first to use it when he establishes his old-fashioned disposition at the beginning of the play, which ignites many of the events leading to Hamlet's tragic ending. After Polonius speculates that Hamlet has gone mad with love for Ophelia, he reports this information to the king. To confirm this, observe their interaction in the convent scene. Polonius wants to prove his theory and the deception is what leads him to investigate further, believing that Hamlet is truly madly in love with Ophelia, loosens the straw on the conversation between Hamlet and Gertrude and ends up causing her death. Once again, we see that deception is the most important theme of Hamlet because it is responsible for the progression of the plot