Non-Canon Alert! The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
An outrider from Rohan, Eaoden is the final member to join your party. He is extremely skilled with the spear and has some amazing Spirit Powers that allow him to do some serious character and enemy stat manipulations.
Though not much is known about this rider, he was one of the few to aid Gondor in the earlier battle for Osgiliath, where a soldier named Berethor fled in terror whilst stabbed by the Witch-king's morgul blade. The last player character to join the party, he later reveals the truth upon returning into the city to fight off Gothmog's forces.