Our first impressions of Caliban are that of an evil monster. This is seen in act 1 scene 2 "As wicked dew as e"er my mother brush’d with raven’s feather from unwholesome fen drop on you both! A southwest blow on ye and blister you all o’er.” Shakespeare used harsh words and very poetic and aggressive writing for the character of Caliban. Prospero also feels that Caliban takes everything he has done for him for granted. He is impressed and calls them his new god. His only doing as Prospero wants because he has power over Caliban and if not for that Caliban would be the ruler of the isle. He tries to rape his daughter Miranda "till though didst seek to violate my child" (act1 scene2 line347). His relationship with his master Prospero is that of hatred and detest. Caliban loathes Prospero and that is why he is always rebelling and insulting him.
We learn from the introduction of Caliban, that he is a slave and this is a theme throughout the entire play. Prospero is also very prejudice against Caliban and almost manipulates him into being violent and argumentative.
Caliban is portrayed as more animal than human.