Some characters in Shakespeare's play "The Tempest" are Prospero, Miranda, Ariel, Caliban and Ferdinand. Others are Alonso, Antonio, Sebastian, Gonzalo and Boatswain. Trinculo and Stephano are two minor characters in the play. Iris, Ceres, Juno, Nymphs and Reapers are spirit characters in the play who are summoned and used by Prospero for their magical powers.
The play's protagonist is Prospero, who is Miranda's father. Prior to the events of the play, Prospero was the Duke of Milan. His brother, Antonio, and Alonso, the King of Naples, force him out of his royal position and exile him, and in the play he escapes with his daughter on a ship that ends up shipwrecked on an island. His goals in the story are to force his usurpers to repent and to regain his position of power.
The play's antagonist role is played by Sebastian, Antonio and Alonso. Antonio is the source of the play's primary conflict, while Sebastian and Alonso provide other sources of conflict in the play that move the plot forward.
Ariel is Prospero's magic spirit that is called upon to complete magic tasks in the play as part of Prospero's plan of retribution. Ariel seeks freedom from Prospero in the play.
Caliban also does Prospero's bidding. He is a giant beast and also desires to be free from doing Prospero's will.
Characters are brought to the island by a shipwreck that is caused by the tempest. These characters are Alonso, Ferdinand, Sebastian, Antonio, Gonzolo, Stephano and Trinculo, who is a jester who tries to kill Prospero.