Jonnie Goodboy Tyler is a fictional character from the science fiction novel "The Invaders" by L. Ron Hubbard. He is portrayed as a courageous and determined individual who becomes a leader in the fight against alien invaders on Earth. His character embodies themes of bravery and resilience in the face of overwhelming odds. In the story, Jonnie discovers that the aliens, known as the Psychlos, have taken control of Earth and enslaved its inhabitants. As he rallies others to resist, Jonnie's journey highlights the struggle for freedom and the importance of unity among people facing a common enemy.