Moss

Moss is a monk from the Order of the Radiant Fist that the party came upon when they took it upon themselves to clear out a camp of bandits (the Maroon Marauders) that had been terrorizing the countryside.
Moss was shackled along with a handful of other prisoners, but when the party caused a distraction, he broke free and took out the guard, moving to unchain the others. He then came to the party's aid, with impressive martial prowess and glowing fists. It was actually Moss who dealt the final blow to the bandit leader.
After defeating the bandits and freeing the prisoners, Moss left to return some of them, a pair of magic academy students, to Arcanum, while the party headed back with the remaining bandits in chains to turn over to the guards in Marabin.