King Théoden is a fictional character from J.R.R. Tolkien's epic fantasy novel, The Lord of the Rings. He is the ruler of Rohan, a kingdom known for its horsemen and vast plains. Initially, Théoden is portrayed as a weakened leader, under the influence of the treacherous Gríma Wormtongue. However, he eventually regains his strength and courage, rallying his people against the forces of Sauron. Théoden plays a crucial role in the battle against the dark powers threatening Middle-earth. He leads his army into the decisive battle at Helm's Deep, showcasing his bravery and leadership. His character symbolizes resilience and the importance of standing up against tyranny.