We're playing Chronicles of the Gatekeeper, and my players turned the tables on me pretty well. They've picked up Gel Marcolf, the villain of Act I, as a tentative ally. I didn't expect it, but they had him captured and made a lot of sense in their arguments. I fully plan to have him turn on them at some point (and so do they), but for the time being, I'm considering recruiting a friend to play him as a PC.
What Career and Specializations would you give this guy? He's definitely a Presence kind of character. My group is currently down to 2 players, a Sentinel:Shadow and a Guardian:Protector/Niman Disciple.