Who is Reuben from Ghost Girl: The True Story of a Child in Peril and the Teacher Who Saved Her and what is their importance?

Reuben is one of the children in Torey's class. He is diagnosed with autism. Reuben's parents were instrumental in getting the special education class at Pecking School organized. During the last day of class during Torey's first year of teaching, Jadie's bites Reuben's penis while they are in the restroom together. Reuben does not speak and it is often difficult for Torey to orient him to the activities that he needs to complete.