Justice is just a word that every creatures uses to make others think what they did was the right thing to do, but it's just a word not something from a fairy tale book about silver knights being the holy light of the heavens. Right and wrong are seen from different perspectives. Killing is wrong, but hanging the "guilty" is right. Why should it matter to two being that knows that there's no such thing as good or bad, but death and life?

The sisters believe that having a land full of peace is possible to achieve, however, they do not know what their subjects do when they're not watching. Two creatures hunt down the those who shed blood, they don't care how some of Equestria's citizen sees them as heroes and how most sees them as monsters. Read the tale of a man and his wolf companion how they handle the life of the world they live in.
(Story has been put on hiatus due to me forgetting the reason why I wrote this and interest on it)