Thorin Oakenshield is a fictional character from J.R.R. Tolkien's works, primarily featured in The Hobbit. He is the leader of the company of dwarves who embark on a quest to reclaim the Lonely Mountain and its treasure from the dragon Smaug. Thorin is known for his strong sense of duty, bravery, and determination, as well as his royal lineage as the heir to the throne of Durin. Thorin is characterized by his deep pride and sometimes stubborn nature, which can lead to conflict with others, including his companions. Throughout the story, he grapples with the burdens of leadership and the effects of greed, particularly as the quest progresses and tensions rise over the treasure they seek.