Sinfully Addicted

The average person would walk past a murderer about 36 times in their lifetime.
But you could walk past me and think nothing, I'm the person they never expect, you see me and think, that I'm a cute, sensitive, soft girl, but you'd be wrong, so very wrong.
No one suspects me, based off of my appearance, and that's where they're foolish, very foolish.
They never suspect me until I'm the very last thing they see before they leave this world.