A supporting character is a character in a narrative that is not focused on by the primary storyline, but appears or is mentioned in the story enough to be more than just a minor character or a cameo appearance. Sometimes, supporting characters may develop a complex back-story of their own, but this is usually in relation to the main character, rather than entirely independently. In television, supporting characters may appear in more than half of the episodes per season
In some cases, especially in ongoing material such as comic books and television series, supporting characters themselves may become main characters in a spin-off if they are sufficiently popular with fans.
- Staff, THR. "6 Characters Who Became the Stars of Their Own Spinoff Films". The Hollywood Reporter. Retrieved 10 June 2016.