I've released a number of variations of the demon guard in the past week. They look and behave in similar ways but have different colored dress, sharing this so you know what they are if you see them.

One of them is Zwei (for the two-hand sword used to break up pike formations) whose task is to find weaknesses in evil groups and breaking them up so that evil beings and people are isolated and cannot organize. 

It's designed to be very viral and unnoticeable, it will move into people's subconscious and borrow parts of their brain to operate from there, then as some virtue (white pure energy) is created from the successful breaking up of evil, it will be used to guide the person to create some gong which contains the form of Zwei. This creates a small enlightenment in that part of the brain and Zwei will then "infect" other people from there, everyone becomes super spreaders and immune to evil organizations.

It was very effective, my nearest environment cleared up instantly after releasing her. Later one of her came back and gave me a "fossilized sea urchin" and said it was just stone and could not be mined for anything "keep it as a decoration".

It seems to be the form of such organizations where evil gather, once all energy was removed from inside them. I put it in a storage and left it there. Later a spirit appeared, seemingly summoned by the sea urchin, it presented itself as "anti-everything" as a personification. A mysterious being, I have yet to see what comes of this.