User blog comment:GotMilk5101520/Tartarus Arc Part 3 ending soon?/@comment-24039250-20140506192938/@comment-7418318-20140509074656

What the soldiers of the Royal Army wore looks more like uniforms than armour. Maybe that's just what they wear during normal peace-/law-keeping duty and they'll get into proper armour once they are sent off to war.

After all policemen and soldiers don't put on their bullet-proof wests the moment they get on duty either. They only do that when they expect to need them and they have enough time to go back to base to get them.

As for the knight order, I hope we'll see them fighting alongside the legal guilds in the final conflict, though I don't expect them to get more than a handfull of frames of them in action. With Arcadios as their leader, I don't think they have mages among them, but maybe they got magic items like the protection amulet that saved Arcadios' life in the lava.