Gandalf has the archetype of an ally, and and he helps Bilbo to develop heroic qualities throughout his journey. Gandalf arrives at Bilbo's Hobbit hole, and gives him the call to adventure. Bilbo initially denies this call, but eventually accepts it; with a promise of treasure. Gandalf has him sign a contract that guarantees he will receive one-fifteenth of the treasure found. Several times Gandalf could have abandoned the group, but he chooses to stay and help them defeat goblins, trolls, and the ravenous wolves. This shows Bilbo how to step up and be a hero. Because of this lesson, Bilbo is able to save the party from the spiders, and to trick the wood elves, and escape. Gandalf is an ally to Bilbo, and without him, Bilbo's journey
