"Barbie" (technically Weston, but absolutely nobody calls him that) is Ree's infamous Advanced Dungeons and Dragons 2nd Edition fighter. He claims his nickname is short for "barbarian," but in fact he is a simple warrior. He is also openly, flamboyantly gay, hitting on men at every opportunity (which has occasionally included dungeons mid-trawl, as well as the standard taverns and caravans).
He dresses in his own skewed version of barbarian clothes: bejeweled weaponry and scabbards and lush fur linings. He is perhaps best known among his traveling companions for a lover he once attracted, largely because it happened while the party was deep in dungeons from which no-one had ever returned, and the lover happened to be a lost priest of the goddess of love.
He is a very lucky "barbarian" and knows it. Barbie is optimistic and confident.