Duke Frederick is a character from William Shakespeare's play, As You Like It. He is the usurping ruler of Duke Senior's lands and is known for his harsh and tyrannical nature. His actions lead to the banishment of Rosalind, the daughter of Duke Senior, which sets the stage for much of the play's conflict. Throughout the story, Duke Frederick's character represents the theme of power and its consequences. His oppressive rule contrasts with the more benevolent leadership of Duke Senior, who has been exiled to the Forest of Arden. Ultimately, Duke Frederick's journey reflects the potential for redemption and change.