Pan

Pan is the God of the Wild, hunting, and rustic music. The son of Dryope and Hermes, Pan appears as an old satyr with incredibly large horns. His Roman counterpart is Faunus(when it came to forests, plains and fields) and Inuus(when it came to cattle). In Roman myths, he is also the god of prophecy, in this case, known as Fatuus.

History
Pan is the Lost Lord of the Wild. An announcement was made that the great god Pan had died which was accepted by most except for the satyrs and nature spirits. Most satyrs dream of finding Pan and apply for a searchers license through the Council of Cloven Elders so they can go looking for Pan. No satyrs ever return from the quest, because of the Golden Fleece (see Polyphemus). Grover has lost his father, grandfather, and uncle to the quest, but also figured out the Golden Fleece dilemma. In mythology pan had a music contest with Apollo everyone but king Miduss voted for Apollo so he gave the king an donkys face.

The Lightning Thief
In The Lightning Thief, Pan is mentioned as Grover needs to help Percy on his quest or he will not be able to get a searchers license to find Pan. After successfully completing the quest, Grover leaves to search for Pan.

The Sea of Monsters
In The Sea of Monsters, Grover's quest for Pan is not going well because of the Golden Fleece. It is attracting satyrs to the island of Polyphemus where they are eaten. After bringing the fleece back to Camp Half-Blood, Grover sets out on the quest again in hope of finding Pan.

The Titan's Curse
While passing through New Mexico in The Titan's Curse Grover senses a strong presence and passes out saying something about the blessing of the wild. At the same time a giant boar flies out of the bushes attacking the groups enemies and later giving the group a ride west. Percy asks what Grover means and he says that he felt the presence of Pan. Later on, Grover tells Percy that he heard Pan's voice say "I await you".

The Battle of the Labyrinth
During the quest in the Labyrinth in The Battle of the Labyrinth Grover and Tyson split away from the group because Grover senses Pan. Later Percy, Annabeth, Rachel, and Nico find them at a riverbank. The group follows the river to a cave where they find Pan lying on a bed. He fades in an out as he is dies. He is surrounded by extinct animals that fade into dust as he dies. Pan tells Grover that he should have died millennia ago but the satyrs prevented his passing. He says that it's his time to go and for Grover to carry on his wisdom to the world. He individually addresses Percy, Annabeth, Tyson, and Rachel but does not address Nico. As Pan dies, some of his energy goes into everyone with a little more going to Grover. When the group gets back to camp they are forced to battle Kronos' Army. During the battle Grover releases a fierce scream which causes Kronos' army to flee in terror. Apparently the scream was an ability of Pan rightly named Panic. When Grover goes before the council the saturs do not believe him, but Dionysus and Chiron do. The satyrs vote to exile Grover, but Chiron and Dionysus (whose vote counts for two) vote to keep him. Since the council reaches an indecision, it is disbanded, allowing Grover to remain.

The Last Olympian
In The Last Olympian, Pan's spirit is carried on in Grover who is joining the satyrs together to protect the wild places that are left in the world.

Powers

 * Presumably, Pan has the standard powers of a god.
 * Can produce a panic, which is passed onto Grover.
 * Presumably has woodland magic
 * He has the powers Grover and the other satyrs used throughout the series