Dáin Ironfoot is a fictional character from J.R.R. Tolkien's Middle-earth legendarium, specifically featured in The Hobbit. He is a Dwarf king of the Iron Hills and a cousin of Thorin Oakenshield. Dáin is known for his bravery and leadership, particularly during the Battle of the Five Armies. In the story, Dáin arrives to aid the Dwarves and their allies against the forces of Sauron and other enemies. After the battle, he becomes the King under the Mountain in Erebor, taking over leadership after Thorin's death. Dáin is characterized by his strength, wisdom, and commitment to his people.