This NPC represents one the many Elves of Mirkwood that the party has come across during their travels:

1.  Galion: From 'Missing Dwarves' in 2945.  Did not trust the party thought that they might be spies-Thiriswen calmed the situation.  Thirswin knew him and that he was an elf of high regard that had been fired by Thranduil for an offense.  (OOC:  he was the one who got drunk and enabled Bilbo and the Dwarves to escape)