Oh, that will make the whole 'kill everyone there' more feasible. Maybe, Roan's been on the run all this time while he's been waiting for the nobles to pick him up for safe passage. But, the nobles are a day late (we know why) and the possibly merchants' defenders - a group of fighters that the merchants of Ssagonot hired to search for Roan and force him to pay for all the damages and suffrage he's caused with his tricks within the trades.
So, if we go with that, then he's been shacked up in that inn for another day, scared to death to leave because there's two defenders waiting for him in the inn or outside who have followed him there. They've already contacted the other members of their group, so they have been watching and waiting, preparing to storm in soon and capture him. One of them might have spotted Arz & Mona walking in, seeing that they are armed and assuming they are possibly there for Roan as well (thinking the Nobles decided to send warriors to collect Roan instead).
So, that sets up something exciting, doesn't it? Great idea, Ded! :3