Edmund's character is further developed through his interactions with other characters in the play. He skillfully plants the seeds of suspicion in Lear's mind against his loyal daughters, Goneril and Regan, by forging a letter that falsely accuses Edgar of treason. This act of deception leads to Edgar's banishment and allows Edmund to inherit his father's earldom.
Edmund's ambition and cunning are evident in his manipulation of the conflict between Lear and his daughters. He plays both sides against each other, pretending to be loyal to Lear while secretly aiding Goneril and Regan in their plot to overthrow him. Edmund's duplicity and treachery make him a formidable adversary, and his success in deceiving those around him demonstrates his shrewdness and resourcefulness.
Despite his cunning, Edmund ultimately faces consequences for his actions. His betrayal of Edgar is revealed, and he is mortally wounded in a duel with his brother. In his final moments, Edmund acknowledges his misdeeds and expresses regret for the pain he has caused. This moment of self-awareness and remorse provides a glimpse into Edmund's complex character, revealing that he is not entirely devoid of human emotion or morality.
Overall, the passage from exposition of King Lear develops character Edmund as a cunning, manipulative, and ambitious individual who almost succeeds in supplanting his unsuspecting brother Edgar. He uses his intelligence and deceit to gain power and control, but his actions ultimately lead to his downfall. Edmund's character is a fascinating exploration of human nature, showcasing the potential for both good and evil within a single individual.