Old Hamlet's ghost reappears in Act Three of the play when Hamlet goes too far in berating his mother. Claudius Old Hamlet's brother, Hamlet's uncle, and Gertrude's newlywed husband. Claudius appears to be a rather dull man who is fond of the pleasures of the flesh, sex and drinking. Claudius is the only character aside from Hamlet to have a soliloquy in the play. Gertrude Old Hamlet's.