A conduit
"Everything ready, my lord."
With Leonidas, all of his bodyguards, Martin, and Leo all gathered at the front of their raiding party, it no longer mattered what kind of uniforms Martin's men were in.
This wasn't the world of information age where the potentially hostile host at the front could get a bird's eye view of them with a drone or a photo directly from a satellite.
In this technologically limited world, even with magic coming in as a crutch, one's eyes often remained the best tool to check things out.
And with all of those men dressed in period-accurate clothes and armor occupying the front of Leonidas' party, the demonic host wouldn't be able to spot anything out of the ordinary.
After all, while bearing the name of demonaes or, more commonly, demons, the inhabitants of the western half of the supercontinent weren't inherently evil, ugly or… or different from humans.