Final answer:
The main character in a tragedy who experiences a downfall due to a personal flaw is known as the tragic hero. This character's story typically culminates in a cathartic experience for the audience, as seen in classic examples such as Creon in Antigone and Hamlet.
Step-by-step explanation:
The most important character in a tragedy who suffers a downfall is called the tragic hero. In the context of Aristotelian definitions and classic theatre, the tragic hero is a protagonist, typically of noble birth, who possesses certain qualities that make them admirable. However, they have a flaw or hamartia, generally a significant error in judgment or an inherent defect in character, which ultimately leads to their downfall. The downfall of the tragic hero elicits feelings of pity and fear, and results in catharsis for the audience.
Creon in Sophocles' Antigone and Hamlet from Shakespeare's play are classic examples of tragic heroes. They are good characters that have their fortunes reversed due to their flaws, leading to their eventual downfall. The tragic hero's story is essential as it conveys a moral lesson and reflects on higher ethical choices concerning the greater community's good.