Cultist. You were a cultist in the past, worshiping some terrible demon, god, or being.
Assassin. You are a reformed assassin, and took out targets for monetary gain.
Mercenary. You were a mercenary, fighting for whichever side had the most money.
Summoner. You had attempted-or succeeded-in summoning dark beings, and might even be trying to hunt them down.
False Criminal. Despite never having commit crimes before, you were convicted or accused of a crime you had no part in.
Shamed Murderer. You had killed somebody you had no intention of killing, and now are hiding because of it.