It is kind of a lousy excuse for a disguise, but to the ignorant and uninitiated they could be mistaken for just another one of their followers!
Also that belt there is blessed, it keeps their whole "being a bubbling plague cauldron" thing at bay, to be discreet and to get around better.

(Also I do want to mention this is a redraw! I could of sworn I posted the original but for the life of me I can't find it anywhere and I'm starting to think I never posted, anyone remember?)