Gandalf bears the title Gandalf the Grey in J.R.R. Tolkien’s The Lord of the Rings.
Gandalf is one of the Istari, emissaries sent to Middle-earth to oppose Sauron. He first appears in The Hobbit as the wizard who helps set Bilbo’s adventure in motion, and he returns in The Lord of the Rings as a central guide and strategist.
After confronting the Balrog on the Bridge of Khazad-dûm, Gandalf falls into the depths of Moria. He later returns as Gandalf the White, a transformed figure with greater authority, after defeating the Balrog and completing his task.
Saruman is also an Istar but is associated with the title Saruman the White, while Radagast is known as the Brown. Gandalf’s color titles therefore mark different stages of his story rather than different characters.