What about Brendt?

[Enkidoh]

The merchant in the opening scene is actually one of three different people (one for each city - it turns out they're brothers).

Also it's revealed later on that all three are actually members of the Scions of the Seventh Dawn - after the escape from Castrum Centri they can be found in the Waking Sands, and in fact they're still there inside the Waking Sands as part of the victory party following the completion of the main storyline (after the ending scene and end credits have finished playing) - the one from the opening for the city you started in actually references your first meeting with them in that scene.

That's the last they're seen though from what I remember.