There are several major characters in the play "The Tempest" by William Shakespeare.
Prospero: is a magician and also the legitimate Duke of Milan. He is exiled on and rules the island where the play is set. He is the brother of Antonio and father of Miranda.
Miranda is the daughter of Prospero and the ingenue. She and Ferdinand falls in love.
Ferdinand is the son of Alonso, King of Naples. He loves Miranda.
Ariel is a supernatural but generally good spirit who serves Prospero.
Caliban, son of the witch Sycorax is ugly and monstrous but also the rightful owner of the island, reduced to slavery by Prospero. He resents Prospero's attempt to civilize and control him, saying
You taught me language, and my profit on't
Is I know how to curse. The red plague rid you
For learning me your language!
Alonso: King of Naples, father of Ferdinand.