Gandalf is a central character in J.R.R. Tolkien's The Lord of the Rings and The Hobbit. He is a wise and powerful wizard known for his long beard, iconic grey robes, and a staff that aids him in his magical endeavors. Gandalf plays a crucial role in guiding the protagonists, including Frodo Baggins and Aragorn, on their quests to defeat the dark lord Sauron. As a member of the Istari, Gandalf embodies wisdom and courage. He is not only a formidable fighter but also a compassionate mentor, helping to unite the Free Peoples of Middle-earth against evil. His character represents the struggle between good and evil, making him a beloved figure in fantasy literature.