Pan was a speaking satyr. He met Jason and Hercules on Delphi and joined them on their journey. He was very wise and friendly. Back at Delphi he knew the Oracle and led Jason to her. In the fight he could knock down many opponents wiht his powerful stick.
He also guided Jason on the cursed Kythra as he was there before.
He was a few centuries old as he told Jason on the board of Argos.