I used many McFarlane based parts from the Spawn series with a custom sculpted head and custom paint.
When I was making this custom I imagined her backstory to be that she was casted from her home world only with the weapons that she had on her as if she was exiled. The only way she could make her way in the galaxy was killing for profit and learning may techniques from other cultures in capturing or killing for money or profit and sometimes for fun of the hunt.