Thorin Oakenshield, son of Thráin, son of Thrór, King Under the Mountain is a major character in The Hobbit and is mentioned in passing in The Lord of the Rings. He was the leader of the Company of Dwarves who aimed to reclaim the Lonely Mountain from Smaug the dragon, and was the son of Thráin II, the King of Durin's Folk in their exile from Erebor, and the grandson of King Thrór.


Thorin is described as being very haughty, stern, and officious. He has a talent for singing and playing the harp, wears a gold chain, and has a very long beard. His appearance is also characterized by his distinct sky blue hood. He refers to his homes in the Blue Mountains as "poor lodgings in exile." He is a capable and a cunning warrior, if not a particularly inspiring or clever leader. While shorter than elves or men, Thorin is said to be quite tall for a dwarf.