Answer and Explanation:
Caliban is a very complex and intriguing character, but we can see that he does not accept the situation of being enslaved. First, Caliban makes it very clear that Prospero usurped his island, taking it by force. He very much wants to get rid of Prospero because he recognizes that he will never be seen as an equal. Another way that Caliban finds to change his slave situation is to try to repopulate the island with Prospero's daughter.
When he is called a slave, he recognizes that this is an abuse and an uncomfortable situation and wants to get rid of it.