The master-servant relationships dominate in the cases of the characters Prospero and Ariel; and Prospero and Caliban. Though the two relationships are different, the one with Ariel is generally positive and the relationship with Caliban is generally negative. Both Ariel and Caliban are acutely aware of their subservience role. The relationship between Prospero and his slave Caliban is obviously a difficult one. He quite obviously resents Prospero as master of the island and indeed himself.
Prospero's other relationship is with Ariel - the 'airy' spirit. Ariel's relationship with Prospero is quite different to that of Prospero and Caliban. Although Ariel is not quite human himself, his magical abilities give him a great deal of power over Caliban and make him an indispensable servant to Prospero. The powerful Prospero may have released Ariel from imprisonment, but he has given him a new “sentence” as his own slave. Caliban does seem much more aware of this than Ariel, even claiming that Prospero has taken advantage of this. Ariel, although lacking human emotion, seems to crave the approval of his master as the play progresses. Prospero's final act of giving freedom to Ariel shows us how Prospero has changed throughout the course of the play, from a dictator-like sorcerer focused on retribution, to a forgiving father figure.
The theme of freedom versus control in The Tempest is very