The mentor archetype is a character who is more experienced than others and is able to provide them with knowledge and wisdom. They are usually much older than the hero and teach them life lessons or skills. Gandalf, from the “Lord of the Rings,” fits the mentor archetype.
In the “Lord of the Rings,” Frodo receives a ring from Bilbo Baggins and is told by Gandalf that Frodo must leave the shire, where he lives, and make sure the ring never goes into the hands of Sauron, the dark lord. Throughout the journey to destroy the ring, Frodo constantly receives knowledge from Gandalf. Gandalf knows the secret passages and what paths to take and so forth. These movies really show the wise old man archetype, passing on their knowledge and helping the hero through their journey.