1. Character Development: Prospero is the most well-developed character in the play. His backstory, motivations, and conflicts form the core of the play's plot. The audience gains insight into his past as the rightful Duke of Milan, his desire for revenge, and his quest for reconciliation.
2. Driving Force: Prospero sets the events of the play in motion by using his magical powers to conjure a tempest and bring his enemies to the enchanted island. He manipulates the characters and orchestrates their encounters to achieve his goals.
3. Power and Control: Prospero possesses exceptional magical abilities that give him control over the island and its inhabitants. His command over the spirits, including Ariel and Caliban, reflects his authority and agency in shaping the play's events.
4. Transformative Role: Prospero uses his magic and manipulation to bring about transformations in other characters. He seeks to reform his enemies, teach his daughter Miranda about human nature, and ultimately achieve his own redemption and reconciliation.
5. Moral Complexity: Prospero's character is morally ambiguous. While he desires justice for the wrongs done to him, his methods often raise questions about his ethics. This complexity adds depth to his character and makes him more compelling.
6. Resolution and Catharsis: The play's resolution largely hinges on Prospero's actions and decisions. He brings closure to the conflicts and achieves catharsis by pardoning his enemies and renouncing his magical powers.
Therefore, Prospero's central role, motivations, and influence make him the main protagonist of "The Tempest."