industrygothica
Adventurer
As a youngish kid/man from Barovia, it is quite possible he is friends with Ismark and/or Ireena, the Burgomaster's children. He is a bit younger than they are, but not by too much. If that were to be the case, he could be at the Burgomaster's manse discussing something with them (or checking up on them or whatever) when the PC's return, which would make adding him to the group fairly easy.
That works famously. You'll have to go over with me exactly what he knows and doesn't know about whatever is going on--I've been keeping up with the IC thread since the restart, but haven't had the chance to read over the previous pages.