Aragorn, also known as Strider, is a pivotal character in J.R.R. Tolkien's 'The Lord of the Rings' series. As the heir of Isildur and rightful king of Gondor, he plays a crucial role in the quest to destroy the One Ring. Aragorn is a skilled warrior and a wise leader, characterized by his humility, bravery, and deep sense of duty. Throughout the series, he evolves from a ranger into a king, ultimately leading the forces of good in the fight against Sauron and restoring peace to Middle-earth.