The label "being marginalized" comes from afar and follows the whole history of humanity, proving a very visible reality among humans: the diversity that exists between people. The differences happen in the physical, economic, social, religious aspect, etc. Feeling marginalized is in many cases the result of psychological conditions and non-compliance with one's own life limitations.
An example of this can be seen in the question above, where Cody feels marginalized because of the limitation he has in communicating. Cory has difficulty speaking a few words, he thinks people don't like him for it. He feels marginalized.
The best answer to fill in the blank would be ''Bystander'' because as that role you can go tell any adult or higher authority to stop the fighting so you don't try to be a hero and get yourself hurt as well.
