Madame Soul Eater

There are certain spirits that are just, and others that arn't. Some avenge, some toy. However, there is a legend. That if you do wrong unto the innocent a certain spirit will avenge. This spirit does not feel. Nor does it variate. It is the lap dog of a higher up, a bounty hunter of sorts. Every night it goes after those who are evil in the most twisted ways and does the work of karma.