I'll acknowledge the difficulties inherent in making a collab between six posters - even as few as three can be hard to work around.

As I said though - I'll attempt to work with the current post regardless. I just wanted to make note of the issue so that in the future, perhaps we can attempt a different approach.

In the context of this situation, what I might have done would be to have Pierce blurt out to the entire Bar that the men are Varisie infiltrators, and for Walkins to summon his spirit/draw his weapons and start firing without saying anything (make some token hostile gesture simply to instigate the 'Boss Fight.' >.>) - leave the reality of whether he actually is an Inquisitor for the posters to ponder over and confirm afterwards. Meanwhile, have the four flunkies grab their weapons and start to get out of their seats. While Inquisitors from the church of Aer are (I presume) nominally allowed to come and go as they please, considering that the Western City-States are in a pitched war with Varisie, the knowledge of their nationality alone - combined with their openly worn weapons - is reason enough to attempt to apprehend them.

All of that would happen within just a few instants and still tells us everything we need to know - our characters could, immediately upon hearing the warning, either summon their own spirits, draw their own weapons, preemptively dodged out of the way, all that jazz, and we have a pitched barroom fight scene. It doesn't preclude any other characters from acting (the only event that could have been interrupted would be Pierce's outburst), and it doesn't preclude Walkins and his men from acting either (since they can use that post to start moving).

If you're concerned about getting character growth out of Walkins, I would suggest not putting him in the middle of a bar, surrounded and outnumbered by guild regulars? :P