[PS - I tried searching on this and didn't find anything relevant, but please point me to a thread that covers this if you know of one.]
We're playing IAWA and in the second session we brought back an NPC from the first session and gave her some more color from the Oracle (i.e. she fit the bill for one of the characters). We didn't apply any of the "When your character comes back" rules on page 26 to this NPC. Is that right? Should we be increasing Particular Strengths for the NPCs to keep them in balance with the PCs? Or just because they are clearly more important to the fiction?
Is there a point where doing so or not doing so would become problematic? Five chapters? Ten chapters?
Should we even be working the NPCs into Oracle bits or should the GM bring any NPC into any chapter? What about bringing back a Big Bad later on; should we up their Particular Strength even if they haven't been in the intervening chapters?
When you're in Chapter 3 and beyond, can new NPCs be brought in with Particular Strengths of Significance 2 or does that just apply to PCs?
What's worked and not worked with IAWA NPCs at your table?