character of ariel and caliban

Ariel and Caliban are two important characters in the play, The Tempest written by William Shakespeare. They play a vital role in this play. They stand in sharp contrast to each other. Both are elemental beings. Ariel is the pure spirit of air and fire. But Caliban is half-monster and half-human. Caliban is brutal and sensuous. while Ariel is pure intelligence. Now let us try to compare and contrast the character of Ariel and Caliban with special reference to  the play and discuss about compare and contrast ariel and Caliban.