Who isn't a real character on iCarly?

In the show "iCarly," characters like Carly Shay, Sam Puckett, and Freddie Benson are real characters, while others like the fictional character "Spencer Shay" (Carly's brother) are not real people but part of the show's narrative. Similarly, any guest characters or fictional personas portrayed by the main cast in skits or episodes also aren't real characters outside of the show's context. Additionally, characters created for internet sketches within the series, such as "The Amazing Race," are not real outside of the iCarly universe.