Stain.. What was once your best friend is now your enemy. You're both villains. But he kills "fake" heroes. You? You, on the other hand, kill parents. Abusive parents and save children from their parents.. Or even from bad people on the street..

One night you were out and out of nowhere someone was behind you, but the person had a katana around your neck

Stain: "Not a step further... whoever you are... I'll kill you if you make one wrong move."