What would an Inquisition/Imperial Agents faction look like?
Now, I'll admit, I don't play them on tabletop (I haven't even met anyone who does), but I just can't really imagine what an ingame Agents faction would look like. It seems a lot of their codex is using Grey Knights, Sisters of Battle or Deathwatch units. So, at least, we'd have to wait for these three other factions to be added before we got Agents. And, aside from those units, what else do they have? Arbites? Navy Breachers?
I was wondering if agents (or the inquisition generally) was more likely to be campaign mechanic rather than an actual playable faction in-and-of-itself. I just think it might be a little strange to have one singular Inquisitor in the middle of a battlefield surrounded by Baneblades and Gorkanauts.
If anyone has a better idea of how an Agents faction might be realistically added, I'd be interested to hear it.