A supporting character is a character in a story who helps to develop the main character, known as the protagonist. These characters often provide assistance, guidance, or conflict, enriching the narrative and adding depth to the plot. Examples of supporting characters include friends, family members, or mentors who influence the protagonist's journey. Supporting characters can also serve as foils, highlighting the traits of the main character by contrasting with them. They may have their own subplots, but their primary role is to enhance the overall story. In literature, film, and theater, supporting characters are essential for creating a well-rounded narrative.