'Plane Crossover Anomaly'. 'Nexus' might be a better word. In any case, since our mercenary did not make any references to any demons coming from the northern continent, I suppose the nexus must only occur in the south.
I've put on your DA page a chart showing what the rank insignia on the uniforms represent. It's only a guess based on the premise of Torrin being a very senior officer, but do take a look when you get a chance....
I think I've worked out the insignia. Evidently Torrin is a senior officer, so figuring the three bars and the three diamonds, that would make him an O-6 (equivalent to the rank of a full colonel) which would make his living in personal quarters, being able to have an assistant, plus his having certain 'leeway' with Mistress plausible. RHIP (rank Has It's Privileges)...