Goneril

Goneril’s and Regan’s costuming are a really, really good example of this.

Edgar gives Goneril's letter to Albany.

Edmund sends Lear and Cordelia off with secret-joint orders from him (representing Regan and her forces) and Goneril (representing Albany's) for the execution of Cordelia.

Goneril discovers that she finds Edmund more attractive than her honest husband Albany, whom she regards as cowardly.

Goneril sends Edmund back to Regan; receiving news of Cornwall's death, she fears her newly widowed sister may steal Edmund and sends him a letter through Oswald.

Goneril's suspicions about Regan's motives are confirmed and returned, as Regan rightly guesses the meaning of her letter and declares to Oswald that she is a more appropriate match for Edmund.

In his anger he disinherits Cordelia and divides her share between Regan and Goneril.

In Oswald's pocket, Edgar finds Goneril's letter, in which she encourages Edmund to kill her husband and take her as his wife.

Lear announces he will live alternately with Goneril and Regan, and their husbands.

Lear discovers that now that Goneril has power, she no longer respects him.

Offstage, Goneril, with all her evil plans thwarted, commits suicide.

Regan falls ill, having been poisoned by Goneril, and is escorted offstage, where she dies.

Regan, Goneril, Albany, and Edmund meet with their forces.

Shakespeare Through the Ages: King Lear, p. 317. "As Hazlitt pointed out," writes Bloom, "Edmund does not share in the hypocrisy of Goneril and Regan: his Machiavellianism is absolutely pure, and lacks an Oedipal motive.

When Lear arrives, he objects to the mistreatment of his messenger, but Regan is as dismissive of her father as Goneril was.