Trey is a new Pony Express rider that used to be a stable boy at one of the Pony Express stables. While being a stable boy, he dreamed to one day ride the Pony Express. Trey got his big break when his supervisor ran low on volunteers, and teamed up with Dodge on his first mail run. All the horses love Trey because of his love and care. He especially has a close relationship with Dodge. Trey is an orphan and looks to the horses as his family.