To everyone else, Ponyville seemed like such a perfect and idyllic utopia where nopony had any worries in the world. For Sharp Iron however, he knew that there was much more to life than many of those in Equestria knew of. It had become his mission to reveal the truth of our "purpose" to those around him, all while learning more about who they were as his neighbors.
(Information about OCs is in a separate blog post: https://www.fimfiction.net/blog/933935/meet-the-characters-bios-and-pics-of-ocs)