Call to Adventure: When he is being attacked by his teacher on a field trip. Not only that but when Zeus accuses him of stealing the master lightening bolt
Refusal to call: When his mother is not allowed to cross the boundaries of Camp Half-Blood
Meeting the Mentor: His mentor is his best friend Grover.
Crossing the threshold: Percy crosses the threshold when he crosses to a special world.
Test, Allies, and Enemies: Percy's allies are Anna and Grover, who joins him on the quest. His test are all the monsters he has to fight and the obstacles they go through. His enemies are Zeus, Hades, and Aries.