Champions of Oerth
A caravan guard with a dark secret.
Zert claimed to be a caravan guard waiting in Hommlet for a caravan that was running late, but this proved a lie. When Elmo gathered a group together to rescue the hositages, Zert gladly volunteered. However, once in the Moat House, he betrayed them and joined up with the bandits that had recently moved in.
It wasn’t until much later that it was discovered that he was, in fact, working for the real threat: the bandits who live under the Moat House, and have been runing things for a while. Not only that, but he’s an agent of the Temple of Elemental Evil. The second group found him, but he bartered for his life with a letter containing important information. They let him go, on the grounds that he could never return to within fifteen miles of Hommlet.