Shot gun in a cloak

Mental gymnastics.
I collected the 10 themes of Character Design on Twitter.

■Themes
Steampunk
Large breasts
Quiet girl
Short hair
Prosthetic hand
Shot gun
Grasses
Silver hair and Blue eyes
Odd eye
Stirrup leggings

I think so, She is part of the anti-espionage organization in somewhere industrially advanced country.
She usually pretending a Quiet girl.