Schoolhouse Rocky is the main (yet minor) character of the Schoolhouse Rock song series.
Rocky is an orange haired boy who has muscles like a superhero. Despite being the main character, he only appears in the diner scenes and not in the series itself. He has the body of a stereotypical superhero, very muscular. His best friend and assistant is the girl from the song "A Noun is a Person, Place or Thing". In the intro, he starts off as a skinny young boy, but in the next verse, he transforms into his muscular self.