User blog comment:Guildmaster Grovyle/JLE Role Play, Winter 2015-2016/@comment-24422626-20160105061314

Vesper: Disagreeable workers typically don't last long here. Those of us who are wearing disguises...

* He points to the teal mark in Vega's mane, and then to the one in his own.*

...We share a subtle mark that changes every so often to show who we are. Watch out for the rare shapeshifter who walks in without one. We also don't care for brawls, so if somepony starts throwing tipsy punches feel free to show him to the door.