Cumaean Sibyl
Tolkien once described Gandalf as an angel incarnate; later, both he and other scholars likened Gandalf to the Norse god Odin in his "Wanderer" guise. Others have described Gandalf as a guide-figure who assists the protagonist, comparable to the Cumaean Sibyl who assisted Aeneas in Virgil's "The Aeneid", or to Virgil himself in Dante's "Inferno"; and as a Christ-figure, a prophet.