Answer:
Character
Explanation:
In fiction, a character (sometimes known as a fictional character) is a person or other being in a narrative (such as a novel, play, television series, film, or video game). ... In literature, characters guide readers through their stories, helping them to understand plots and ponder themes.
Main Idea includes the overall message of the text that a writer intends to convey to the audience. Almost all genres of literature have one or two main ideas in them. However, the main idea in literature is not limited to one sentence or paragraph; instead, it develops and grows throughout the text. It works as the central, unifying element of the story which ties together all other elements. In this sense, it can be best defined as the dominant impression or the generic truth incorporated in the literary piece. Etymologically, the central idea is the phrase of two words ‘main’ and ‘idea.’ The meaning is clear that it is the most important thought of a text which enables the readers to understand the layered meanings of the concerned text.
A theme is a universal idea, lesson, or message explored throughout a work of literature. One key characteristic of literary themes is their universality, which is to say that themes are ideas that not only apply to the specific characters and events of a book or play, but also express broader truths about human experience that readers can apply to their own lives.
Resources Used:
https://en.wikipedia.org/wiki/Character_(arts)#:~:text=In%20fiction%2C%20a%20character%20(sometimes,film%2C%20or%20video%20game).&text=In%20literature%2C%20characters%20guide%20readers,understand%20plots%20and%20ponder%20themes.
https://literarydevices.net/main-idea/
https://www.litcharts.com/literary-devices-and-terms/theme