Laertes is Polonius’s son, who prefers life in Paris to Elsinore.
He has some of his father’s moral sententiousness, but both his sister and father suspect that he may not be as upright as he puts out. His father’s death affects him so much that he returns enraged from Paris and raises a rebellion against Claudius. The sight of his mad sister shifts him from rage to grief and allows Claudius to convince him of Hamlet’s guilt. He is willing to do anything for revenge, no matter how treacherous or how dangerous to his soul. He is an excellent fencer.