Let's take a look, shall we?
Her helpless posture and expression outline her inferiority complex. It never feels or looks like she’ll be able to save herself.
She is the one whom the gun is being aimed at, rather than her aiming the gun.
Notice how her stature is much more defying and threatening. She rather looks like she’s entirely in control of her situation.
She seems entirely confident and professional with her weapon, not clumsy as some females are presented.
Note that Joan(left) is placed higher than the hostage, demonstrating her power and control over the situation.
The facial expression of the hostage also shows he is not confident or dominant in the scene.
Both seem to use emotionless facial expressions and don’t show any hints to any information about them. They are also both in secretive locations which would make it hard it track them.
Professional killer; not a gang member.
Note Joan’s professional stance and composure in the interrogation, striking fear into the eyes of her hostage. She is not represented as an unstable, poor or helpless woman as often done with characters of her ethnicity.